| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2010 | 12 | 1 | 1 | 2 | 3 | 2 | 3 | ||||||
| 2009 | 11 | 1 | 2 | 1 | 3 | 1 | 3 | ||||||
| 2008 | 16 | 9 | 1 | 1 | 3 | 1 | 1 | ||||||
| 2007 | 33 | 1 | 1 | 1 | 4 | 1 | 3 | 1 | 8 | 7 | 6 | ||
| 2006 | 6 | 1 | 1 | 1 | 1 | 2 | |||||||
| 2005 | 16 | 1 | 7 | 3 | 1 | 1 | 3 | ||||||
| 2004 | 28 | 1 | 7 | 1 | 2 | 3 | 3 | 9 | 2 | ||||
| 2003 | 26 | 11 | 2 | 1 | 2 | 3 | 3 | 4 | |||||
| 2002 | 60 | 10 | 6 | 8 | 10 | 3 | 2 | 16 | 2 | 3 | |||
| 2001 | 33 | 3 | 1 | 4 | 6 | 1 | 3 | 13 | 2 | ||||
| 2000 | 73 | 10 | 8 | 7 | 9 | 14 | 2 | 1 | 8 | 14 | |||
| 1999 | 46 | 12 | 5 | 5 | 2 | 2 | 2 | 1 | 10 | 3 | 2 | 2 | |
| 1998 | 15 | 6 | 2 | 1 | 3 | 1 | 1 | 1 | |||||
| 1997 | 47 | 2 | 1 | 5 | 6 | 5 | 5 | 10 | 4 | 4 | 5 | ||
| 1996 | 58 | 11 | 2 | 6 | 4 | 11 | 6 | 1 | 10 | 4 | 3 | ||
| 1995 | 94 | 23 | 11 | 6 | 2 | 11 | 8 | 17 | 9 | 7 | |||
| 1994 | 84 | 21 | 1 | 2 | 2 | 14 | 3 | 20 | 2 | 1 | 10 | 8 | |
| 1993 | 86 | 24 | 14 | 6 | 13 | 8 | 3 | 15 | 3 | ||||
| 1992 | 145 | 13 | 11 | 15 | 14 | 6 | 6 | 23 | 9 | 4 | 19 | 16 | 9 |
| 1991 | 113 | 20 | 1 | 15 | 6 | 14 | 15 | 11 | 18 | 13 | |||
| 1990 | 92 | 21 | 5 | 11 | 16 | 5 | 1 | 3 | 10 | 12 | 8 | ||
| 1989 | 84 | 5 | 12 | 14 | 7 | 10 | 6 | 12 | 13 | 5 | |||
| 1988 | 97 | 25 | 2 | 6 | 2 | 2 | 4 | 9 | 7 | 10 | 12 | 18 | |
| 1987 | 51 | 6 | 6 | 5 | 3 | 2 | 2 | 4 | 3 | 2 | 9 | 9 | |
| 1986 | 53 | 4 | 3 | 1 | 1 | 3 | 9 | 9 | 8 | 4 | 6 | 5 | |
| 1985 | 132 | 18 | 2 | 7 | 13 | 16 | 16 | 12 | 14 | 12 | 9 | 13 | |
| 1984 | 88 | 23 | 3 | 2 | 4 | 3 | 17 | 11 | 4 | 8 | 7 | 3 | 3 |
| 1983 | 58 | 8 | 1 | 2 | 1 | 20 | 8 | 5 | 12 | 1 | |||
| 1982 | 104 | 20 | 11 | 8 | 23 | 1 | 2 | 3 | 4 | 24 | 8 | ||
| 1981 | 129 | 18 | 8 | 27 | 1 | 1 | 25 | 7 | 13 | 22 | 5 | 2 | |
| 1980 | 118 | 4 | 6 | 8 | 25 | 9 | 15 | 9 | 4 | 20 | 8 | 10 | |
| 1979 | 120 | 1 | 1 | 25 | 7 | 14 | 14 | 11 | 22 | 8 | 17 | ||
| 1978 | 156 | 12 | 13 | 27 | 15 | 14 | 11 | 17 | 1 | 23 | 9 | 14 | |
| 1977 | 130 | 8 | 9 | 9 | 23 | 17 | 5 | 8 | 12 | 13 | 8 | 18 | |
| 1976 | 115 | 11 | 7 | 2 | 26 | 14 | 2 | 3 | 3 | 6 | 26 | 5 | 10 |
| 1975 | 118 | 9 | 11 | 14 | 6 | 10 | 1 | 2 | 12 | 3 | 26 | 8 | 16 |
| 1974 | 64 | 3 | 14 | 16 | 1 | 2 | 1 | 15 | 7 | 5 | |||
| 1973 | 47 | 4 | 5 | 6 | 6 | 14 | 9 | 1 | 1 | 1 | |||
| 1972 | 40 | 2 | 4 | 2 | 5 | 1 | 1 | 5 | 2 | 3 | 15 | ||
| 1971 | 60 | 3 | 6 | 6 | 23 | 16 | 2 | 1 | 3 | ||||
| 1970 | 112 | 10 | 11 | 10 | 15 | 16 | 9 | 7 | 2 | 2 | 7 | 9 | 14 |
| 1969 | 8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||
| 1968 | 15 | 2 | 2 | 1 | 1 | 3 | 1 | 3 | 1 | 1 | |||
| 1967 | 22 | 1 | 1 | 1 | 4 | 2 | 2 | 1 | 3 | 4 | 1 | 2 | |
| 1966 | 5 | 2 | 1 | 1 | 1 | ||||||||
| 3020 |
