| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2018 | 1 | 1 | |||||||||||
| 2017 | 5 | 1 | 1 | 1 | 1 | 1 | |||||||
| 2016 | 6 | 1 | 3 | 2 | |||||||||
| 2015 | 11 | 1 | 3 | 1 | 2 | 1 | 2 | 1 | |||||
| 2014 | 24 | 4 | 1 | 2 | 4 | 3 | 3 | 2 | 1 | 1 | 3 | ||
| 2013 | 35 | 1 | 2 | 2 | 5 | 7 | 3 | 7 | 1 | 1 | 1 | 5 | |
| 2012 | 29 | 2 | 3 | 3 | 2 | 2 | 1 | 3 | 2 | 4 | 1 | 3 | 3 |
| 2011 | 28 | 2 | 1 | 2 | 1 | 4 | 2 | 4 | 1 | 1 | 4 | 3 | 3 |
| 2010 | 28 | 1 | 4 | 2 | 1 | 1 | 5 | 6 | 2 | 1 | 5 | ||
| 2009 | 43 | 3 | 5 | 3 | 3 | 4 | 4 | 5 | 8 | 4 | 4 | ||
| 2008 | 56 | 1 | 3 | 7 | 1 | 5 | 7 | 8 | 1 | 10 | 4 | 3 | 6 |
| 2007 | 52 | 7 | 3 | 8 | 4 | 5 | 2 | 3 | 3 | 5 | 2 | 5 | 5 |
| 2006 | 9 | 3 | 1 | 3 | 2 | ||||||||
| 2005 | 27 | 3 | 1 | 2 | 5 | 1 | 5 | 1 | 1 | 8 | |||
| 2004 | 99 | 11 | 8 | 8 | 6 | 7 | 10 | 8 | 12 | 9 | 9 | 7 | 4 |
| 2003 | 79 | 1 | 12 | 3 | 9 | 6 | 8 | 9 | 8 | 6 | 13 | 2 | 2 |
| 2002 | 86 | 1 | 4 | 7 | 11 | 13 | 8 | 13 | 16 | 7 | 6 | ||
| 2001 | 54 | 1 | 6 | 5 | 2 | 5 | 4 | 4 | 1 | 5 | 8 | 13 | |
| 2000 | 21 | 5 | 4 | 10 | 1 | 1 | |||||||
| 1999 | 53 | 3 | 2 | 6 | 2 | 11 | 6 | 7 | 9 | 5 | 2 | ||
| 1998 | 121 | 5 | 1 | 16 | 3 | 10 | 9 | 12 | 13 | 16 | 10 | 7 | 19 |
| 1997 | 119 | 3 | 3 | 19 | 10 | 5 | 13 | 12 | 13 | 11 | 7 | 8 | 15 |
| 1996 | 144 | 3 | 7 | 21 | 9 | 6 | 16 | 8 | 21 | 13 | 12 | 10 | 18 |
| 1995 | 119 | 5 | 14 | 16 | 10 | 5 | 18 | 21 | 1 | 13 | 14 | 2 | |
| 1994 | 81 | 3 | 2 | 4 | 2 | 6 | 5 | 2 | 7 | 14 | 11 | 13 | 12 |
| 1993 | 97 | 14 | 8 | 10 | 18 | 5 | 12 | 5 | 9 | 3 | 4 | 1 | 8 |
| 1992 | 97 | 11 | 4 | 10 | 6 | 8 | 11 | 5 | 9 | 8 | 6 | 10 | 9 |
| 1991 | 61 | 4 | 2 | 14 | 2 | 6 | 11 | 4 | 1 | 8 | 3 | 3 | 3 |
| 1990 | 28 | 1 | 5 | 1 | 1 | 4 | 2 | 3 | 11 | ||||
| 1989 | 9 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | ||||
| 1988 | - | ||||||||||||
| 1987 | - | ||||||||||||
| 1986 | 2 | 1 | 1 | ||||||||||
| 1985 | 73 | 26 | 5 | 2 | 1 | 15 | 17 | 3 | 1 | 2 | 1 | ||
| 1984 | 68 | 5 | 5 | 1 | 5 | 2 | 1 | 1 | 8 | 11 | 23 | 3 | 3 |
| 1983 | 75 | 23 | 10 | 2 | 2 | 4 | 4 | 2 | 1 | 22 | 4 | 1 | |
| 1982 | 67 | 3 | 3 | 4 | 10 | 20 | 3 | 2 | 5 | 4 | 4 | 5 | 4 |
| 1981 | 66 | 2 | 3 | 19 | 2 | 4 | 6 | 1 | 2 | 3 | 16 | 7 | 1 |
| 1980 | 45 | 2 | 5 | 23 | 5 | 5 | 2 | 1 | 1 | 1 | |||
| 1979 | 57 | 1 | 6 | 27 | 6 | 5 | 3 | 4 | 5 | ||||
| 1978 | 14 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 3 | ||||
| 1977 | 19 | 2 | 1 | 5 | 3 | 1 | 1 | 1 | 1 | 4 | |||
| 1976 | 13 | 1 | 1 | 5 | 1 | 1 | 1 | 1 | 2 | ||||
| 1975 | 98 | 22 | 12 | 18 | 17 | 15 | 1 | 4 | 1 | 1 | 5 | 2 | |
| 1974 | 115 | 18 | 7 | 12 | 14 | 14 | 15 | 11 | 17 | 7 | |||
| 1973 | 142 | 10 | 11 | 1 | 18 | 17 | 6 | 13 | 8 | 19 | 11 | 17 | 11 |
| 1972 | 99 | 7 | 4 | 13 | 7 | 7 | 18 | 8 | 15 | 14 | 6 | ||
| 2575 |
