| Value |
Category |
| 1 |
Before 1970. |
| 2 |
1970 -1979 |
| 3 |
1980 - 1990 |
| 4 |
1991 - 1995 |
| 5 |
1996 - 2000 |
| 6 |
No major repairs |
| 9 |
|
| 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.