| Value |
Category |
| 1920 |
|
| 1952 |
|
| 1957 |
|
| 1960 |
|
| 1974 |
|
| 1976 |
|
| 1984 |
|
| 1986 |
|
| 1988 |
|
| 1992 |
|
| 1993 |
|
| 1995 |
|
| 1996 |
|
| 1997 |
|
| 1998 |
|
| 1999 |
|
| 2000 |
|
| 2001 |
|
| 2002 |
|
| 2003 |
|
| 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.