| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2019 | 7 | 1 | 4 | 1 | 1 | ||||||||
| 2018 | 10 | 3 | 2 | 1 | 2 | 1 | 1 | ||||||
| 2017 | 14 | 1 | 2 | 4 | 3 | 3 | 1 | ||||||
| 2016 | 12 | 2 | 1 | 1 | 1 | 3 | 3 | 1 | |||||
| 2015 | 15 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 4 | 1 | |||
| 2014 | 26 | 3 | 7 | 1 | 3 | 5 | 1 | 1 | 1 | 4 | |||
| 2013 | 13 | 1 | 1 | 4 | 1 | 2 | 1 | 2 | 1 | ||||
| 2012 | 26 | 3 | 2 | 2 | 2 | 8 | 1 | 3 | 3 | 2 | |||
| 2011 | 17 | 2 | 3 | 3 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | ||
| 2010 | 26 | 2 | 4 | 1 | 2 | 1 | 6 | 3 | 2 | 3 | 2 | ||
| 2009 | 18 | 1 | 4 | 1 | 3 | 4 | 3 | 2 | |||||
| 2008 | 46 | 6 | 3 | 9 | 3 | 3 | 4 | 8 | 3 | 6 | 1 | ||
| 2007 | 66 | 5 | 4 | 5 | 2 | 5 | 2 | 7 | 6 | 6 | 9 | 11 | 4 |
| 2006 | 52 | 2 | 5 | 6 | 4 | 6 | 7 | 5 | 4 | 3 | 10 | ||
| 2005 | 12 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 2 | ||||
| 2004 | 22 | 1 | 2 | 2 | 3 | 2 | 6 | 2 | 3 | 1 | |||
| 2003 | 17 | 3 | 3 | 2 | 2 | 2 | 1 | 2 | 2 | ||||
| 2002 | 19 | 2 | 3 | 1 | 1 | 1 | 1 | 5 | 5 | ||||
| 2001 | 14 | 1 | 1 | 3 | 1 | 3 | 5 | ||||||
| 2000 | 41 | 2 | 6 | 11 | 1 | 3 | 3 | 1 | 3 | 5 | 2 | 4 | |
| 1999 | 38 | 2 | 2 | 4 | 7 | 6 | 3 | 4 | 10 | ||||
| 1998 | 51 | 5 | 1 | 5 | 13 | 3 | 8 | 9 | 7 | ||||
| 1997 | 22 | 6 | 3 | 4 | 1 | 1 | 3 | 1 | 3 | ||||
| 1996 | 67 | 4 | 3 | 8 | 8 | 11 | 13 | 3 | 6 | 4 | 3 | 3 | 1 |
| 1995 | 93 | 11 | 13 | 16 | 6 | 4 | 10 | 11 | 8 | 3 | 4 | 6 | 1 |
| 1994 | 80 | 1 | 2 | 4 | 6 | 1 | 4 | 5 | 15 | 15 | 15 | 12 | |
| 1993 | 81 | 3 | 3 | 15 | 21 | 20 | 7 | 7 | 1 | 1 | 1 | 2 | |
| 1992 | 114 | 17 | 16 | 18 | 14 | 13 | 6 | 8 | 1 | 3 | 11 | 7 | |
| 1991 | 193 | 16 | 22 | 16 | 13 | 13 | 17 | 14 | 14 | 14 | 18 | 19 | 17 |
| 1990 | 163 | 20 | 10 | 14 | 12 | 9 | 12 | 13 | 18 | 13 | 11 | 15 | 16 |
| 1989 | 129 | 11 | 7 | 8 | 5 | 6 | 14 | 11 | 12 | 7 | 17 | 18 | 13 |
| 1988 | 201 | 24 | 13 | 25 | 8 | 18 | 18 | 17 | 17 | 12 | 13 | 18 | 18 |
| 1987 | 97 | 7 | 5 | 11 | 5 | 15 | 1 | 1 | 9 | 16 | 16 | 11 | |
| 1986 | 124 | 16 | 5 | 11 | 9 | 9 | 7 | 11 | 7 | 16 | 5 | 12 | 16 |
| 1985 | 118 | 16 | 10 | 9 | 8 | 6 | 13 | 10 | 11 | 10 | 9 | 8 | 8 |
| 1984 | 185 | 9 | 18 | 15 | 11 | 8 | 17 | 31 | 17 | 19 | 14 | 11 | 15 |
| 1983 | 151 | 15 | 13 | 11 | 10 | 18 | 10 | 12 | 21 | 11 | 8 | 14 | 8 |
| 1982 | 102 | 3 | 4 | 3 | 6 | 5 | 3 | 10 | 18 | 13 | 14 | 16 | 7 |
| 1981 | 161 | 13 | 24 | 17 | 12 | 19 | 14 | 6 | 13 | 20 | 10 | 11 | 2 |
| 1980 | 41 | 2 | 5 | 1 | 8 | 5 | 1 | 9 | 10 | ||||
| 1979 | 10 | 5 | 1 | 2 | 2 | ||||||||
| 2694 |
