| Value | Category |
|---|---|
| -9 | do not know |
| -7 | not in business at the end of 2006 |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 27 | |
| 28 | |
| 29 | |
| 30 | |
| 31 | |
| 32 | |
| 33 | |
| 35 | |
| 37 | |
| 38 | |
| 40 | |
| 41 | |
| 42 | |
| 44 | |
| 45 | |
| 46 | |
| 47 | |
| 50 | |
| 51 | |
| 54 | |
| 55 | |
| 56 | |
| 57 | |
| 60 | |
| 61 | |
| 65 | |
| 67 | |
| 69 | |
| 70 | |
| 72 | |
| 75 | |
| 80 | |
| 84 | |
| 88 | |
| 90 | |
| 91 | |
| 92 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | |
| 100 | |
| 101 | |
| 106 | |
| 108 | |
| 109 | |
| 112 | |
| 113 | |
| 114 | |
| 118 | |
| 120 | |
| 125 | |
| 130 | |
| 140 | |
| 150 | |
| 160 | |
| 170 | |
| 185 | |
| 188 | |
| 194 | |
| 198 | |
| 200 | |
| 202 | |
| 214 | |
| 220 | |
| 254 | |
| 262 | |
| 280 | |
| 300 | |
| 330 | |
| 350 | |
| 352 | |
| 361 | |
| 400 | |
| 402 | |
| 420 | |
| 430 | |
| 441 | |
| 450 | |
| 492 | |
| 546 | |
| 550 | |
| 600 | |
| 700 | |
| 790 | |
| 850 | |
| 930 | |
| 950 | |
| 1000 | |
| 1053 | |
| 1100 | |
| 1150 | |
| 1500 | |
| 3000 | |
| 4500 |