| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 375 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 410 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 424 |  | 
                                    
                    
                        | 425 |  | 
                                    
                    
                        | 430 |  | 
                                    
                    
                        | 440 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 460 |  | 
                                    
                    
                        | 470 |  | 
                                    
                    
                        | 475 |  | 
                                    
                    
                        | 480 |  | 
                                    
                    
                        | 492 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 510 |  | 
                                    
                    
                        | 520 |  | 
                                    
                    
                        | 525 |  | 
                                    
                    
                        | 530 |  | 
                                    
                    
                        | 533 |  | 
                                    
                    
                        | 536 |  | 
                                    
                    
                        | 537 |  | 
                                    
                    
                        | 540 |  | 
                                    
                    
                        | 549 |  | 
                                    
                    
                        | 550 |  | 
                                    
                    
                        | 560 |  | 
                                    
                    
                        | 562 |  | 
                                    
                    
                        | 563 |  | 
                                    
                    
                        | 565 |  | 
                                    
                    
                        | 568 |  | 
                                    
                    
                        | 570 |  | 
                                    
                    
                        | 575 |  | 
                                    
                    
                        | 580 |  | 
                                    
                    
                        | 587 |  | 
                                    
                    
                        | 588 |  | 
                                    
                    
                        | 590 |  | 
                                    
                    
                        | 592 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 607 |  | 
                                    
                    
                        | 608 |  | 
                                    
                    
                        | 610 |  | 
                                    
                    
                        | 612 |  | 
                                    
                    
                        | 612.5 |  | 
                                    
                    
                        | 615 |  | 
                                    
                    
                        | 616 |  | 
                                    
                    
                        | 620 |  | 
                                    
                    
                        | 624 |  | 
                                    
                    
                        | 625 |  | 
                                    
                    
                        | 628 |  | 
                                    
                    
                        | 630 |  | 
                                    
                    
                        | 632 |  | 
                                    
                    
                        | 637 |  | 
                                    
                    
                        | 640 |  | 
                                    
                    
                        | 648 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 656 |  | 
                                    
                    
                        | 660 |  | 
                                    
                    
                        | 664 |  | 
                                    
                    
                        | 668 |  | 
                                    
                    
                        | 670 |  | 
                                    
                    
                        | 672 |  | 
                                    
                    
                        | 675 |  | 
                                    
                    
                        | 680 |  | 
                                    
                    
                        | 688 |  | 
                                    
                    
                        | 690 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 704 |  | 
                                    
                    
                        | 710 |  | 
                                    
                    
                        | 712 |  | 
                                    
                    
                        | 716 |  | 
                                    
                    
                        | 720 |  | 
                                    
                    
                        | 725 |  | 
                                    
                    
                        | 729 |  | 
                                    
                    
                        | 730 |  | 
                                    
                    
                        | 740 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 760 |  | 
                                    
                    
                        | 770 |  | 
                                    
                    
                        | 775 |  | 
                                    
                    
                        | 780 |  | 
                                    
                    
                        | 790 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 810 |  | 
                                    
                    
                        | 815 |  | 
                                    
                    
                        | 816 |  | 
                                    
                    
                        | 820 |  | 
                                    
                    
                        | 825 |  | 
                                    
                    
                        | 840 |  | 
                                    
                    
                        | 850 |  | 
                                    
                    
                        | 860 |  | 
                                    
                    
                        | 870 |  | 
                                    
                    
                        | 875 |  | 
                                    
                    
                        | 880 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 920 |  | 
                                    
                    
                        | 950 |  | 
                                    
                    
                        | 980 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1050 |  | 
                                    
                    
                        | 1100 |  | 
                                    
                    
                        | 1150 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1700 |  | 
                                    
                    
                        | 2147483625 | don't know | 
                                    
                    
                        | 2147483639 | refusal | 
                                    
                    
                        | 2147483640 | skipped | 
                                    
                    
                        | 2147483645 | .x. censored | 
                                    
                    
                        | 10001 | .. | 
                                    
                    
                        | Sysmiss |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.