| |
Rate |
| 1976 |
5287 |
| 1977 |
5078 |
| 1978 |
5140 |
| 1979 |
5565 |
| 1980 |
5950 |
| 1981 |
5858 |
| 1982 |
5604 |
| 1983 |
5175 |
| 1984 |
5038 |
| 1985 |
5225 |
| 1986 |
5502 |
| 1987 |
5575 |
| 1988 |
5695 |
| 1989 |
5774 |
| 1990 |
5803 |
| 1991 |
5898 |
| 1992 |
5661 |
| 1993 |
5487 |
| 1994 |
5374 |
| 1995 |
5275 |
| 1996 |
5088 |
| 1997 |
4927 |
| 1998 |
4620 |
| 1999 |
4267 |
| 2000 |
4125 |
| 2001 |
4163 |
| 2002 |
4125 |
| 2003 |
4067 |
| 2004 |
3977 |
| 2005 |
3901 |
| 2006 |
3808 |
|