| | 1978 | | 1979 | | 1980 | | | 1981 | | 1982 | | 1983 | | 1984 | | 1985 | | | 1986 | | 1987 | | 1988 | | 1989 | | 1990 | | | 1991 | | 1992 | | 1993 | | 1994 | | 1995 | | | 1996 | | 1997 | | 1998 | | 1999 | | 2000 | | | 2001 | | 2002 | | 2003 | | 2004 | | 2005 | | | 2006 | | 2007 | | 2008 | | |
|
| | | | | | | 10897 | 6497 | 59.6 | 914 | 826 | 90.4 | | 8375 | 5297 | 63.2 | 676 | 577 | 85.4 | | 7981 | 5628 | 70.5 | 602 | 523 | 86.9 | | | | | | | | 13855 | 9474 | 68.4 | 1053 | 932 | 88.5 | | 11420 | 8315 | 72.8 | 993 | 910 | 91.6 | | 10912 | 8238 | 75.5 | 1399 | 1308 | 93.5 | | 5825 | 4729 | 81.2 | 834 | 779 | 93.4 | | 7971 | 6408 | 80.4 | 1315 | 1139 | 86.6 | | | | | | | | 8604 | 6779 | 78.8 | 1782 | 1484 | 83.3 | | 7801 | 6379 | 81.8 | 1879 | 1519 | 80.8 | | 9016 | 7600 | 84.3 | 2548 | 2102 | 82.5 | | 9241 | 7797 | 84.3 | 3493 | 2794 | 79.9 | | 10874 | 9077 | 83.5 | 4137 | 3218 | 77.8 | | | | | | | | 19766 | 12270 | 62.1 | 8504 | 4489 | 52.8 | | 17771 | 11606 | 65.3 | 6208 | 3604 | 58.1 | | 16573 | 11440 | 69.0 | 7123 | 4470 | 62.8 | | 16348 | 12150 | 74.3 | 7818 | 5257 | 68.5 | | 16267 | 12435 | 76.4 | 8964 | 6426 | 71.7 | | | | | | | | 13068 | 10737 | 82.2 | 7743 | 6220 | 80.3 | | 14068 | 11428 | 81.2 | 8969 | 7013 | 78.2 | | 72039 | 16519 | 22.9 | 47446 | 8753 | 18.4 | | 65750 | 21285 | 32.4 | 43251 | 10863 | 25.1 | | 82849 | 32707 | 39.5 | | | | | | | | | | | 77898 | 44812 | 57.5 | | | | | 71310 | 41657 | 58.4 | | | | | 70989 | 36467 | 51.4 | | | | | 93394 | 44785 | 48.0 | | | | | 107988 | 59035 | 44.4 | | | | | | | | | | | 120554 | 66399 | 43.0 | | | | | 127446 | 74232 | 42.1 | | | | | 90045 | 63294 | 46.9 | | | | | | | | | | | | | | | | |