| Year | Jan. | Feb. | Mar. | Apr. | May. | Jun. | Jul. | Aug. | Sep. | Oct. | Nov. | Dec. | Ann. |
| 1950 | 0 | 1 | 1 | 5 | 12 | 1 | 0 | 0 | 2 | 1 | 0 | 0 | 23 |
| 1951 | 0 | 2 | 0 | 11 | 11 | 11 | 4 | 2 | 1 | 1 | 0 | 0 | 43 |
| 1952 | 0 | 0 | 0 | 7 | 5 | 5 | 4 | 1 | 0 | 0 | 0 | 0 | 22 |
| 1953 | 0 | 4 | 7 | 9 | 8 | 13 | 4 | 2 | 0 | 0 | 5 | 2 | 54 |
| 1954 | 0 | 0 | 7 | 13 | 19 | 4 | 4 | 2 | 3 | 1 | 0 | 0 | 53 |
| 1955 | 1 | 1 | 0 | 15 | 32 | 22 | 4 | 2 | 0 | 0 | 0 | 0 | 77 |
| 1956 | 0 | 2 | 1 | 20 | 6 | 9 | 7 | 2 | 0 | 1 | 1 | 0 | 49 |
| 1957 | 4 | 0 | 0 | 40 | 45 | 5 | 4 | 3 | 5 | 1 | 0 | 0 | 107 |
| 1958 | 0 | 2 | 0 | 4 | 4 | 8 | 6 | 2 | 4 | 0 | 12 | 0 | 42 |
| 1959 | 0 | 2 | 16 | 3 | 35 | 1 | 3 | 5 | 2 | 2 | 1 | 0 | 70 |
| 1960 | 1 | 3 | 5 | 19 | 61 | 2 | 3 | 2 | 1 | 0 | 1 | 0 | 98 |
| 1961 | 0 | 4 | 10 | 14 | 42 | 7 | 3 | 0 | 1 | 1 | 0 | 0 | 82 |
| 1962 | 0 | 0 | 0 | 4 | 33 | 21 | 6 | 3 | 0 | 0 | 0 | 0 | 67 |
| 1963 | 0 | 0 | 3 | 1 | 11 | 4 | 4 | 1 | 2 | 1 | 3 | 0 | 30 |
| 1964 | 0 | 0 | 0 | 17 | 22 | 3 | 4 | 4 | 1 | 0 | 2 | 0 | 53 |
| 1965 | 0 | 0 | 3 | 21 | 32 | 8 | 0 | 5 | 5 | 0 | 0 | 0 | 74 |
| 1966 | 0 | 1 | 0 | 8 | 11 | 13 | 1 | 0 | 2 | 0 | 0 | 0 | 36 |
| 1967 | 4 | 0 | 0 | 12 | 4 | 23 | 4 | 0 | 2 | 0 | 0 | 0 | 49 |
| 1968 | 0 | 0 | 0 | 16 | 26 | 9 | 0 | 1 | 0 | 0 | 0 | 3 | 55 |
| 1969 | 0 | 0 | 0 | 10 | 5 | 13 | 1 | 0 | 1 | 1 | 0 | 0 | 31 |
| 1970 | 0 | 0 | 0 | 8 | 5 | 17 | 2 | 1 | 9 | 8 | 0 | 0 | 50 |
| 1971 | 0 | 2 | 2 | 8 | 13 | 8 | 1 | 0 | 0 | 1 | 0 | 4 | 39 |
| 1972 | 0 | 0 | 0 | 11 | 5 | 6 | 3 | 1 | 0 | 2 | 0 | 2 | 30 |
| 1973 | 1 | 0 | 7 | 9 | 19 | 24 | 1 | 1 | 3 | 3 | 8 | 0 | 76 |
| 1974 | 0 | 1 | 2 | 3 | 9 | 24 | 0 | 3 | 0 | 1 | 2 | 0 | 45 |
| 1975 | 1 | 6 | 1 | 1 | 7 | 9 | 1 | 0 | 0 | 0 | 4 | 4 | 34 |
| 1976 | 0 | 3 | 6 | 7 | 7 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 28 |
| 1977 | 0 | 1 | 11 | 4 | 31 | 3 | 2 | 2 | 0 | 0 | 0 | 0 | 54 |
| 1978 | 0 | 0 | 0 | 14 | 5 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 21 |
| 1979 | 0 | 0 | 5 | 17 | 7 | 3 | 2 | 13 | 1 | 2 | 1 | 0 | 51 |
| 1980 | 0 | 0 | 3 | 7 | 9 | 1 | 0 | 2 | 2 | 1 | 0 | 0 | 25 |
| 1981 | 0 | 0 | 1 | 11 | 44 | 7 | 5 | 2 | 2 | 3 | 1 | 0 | 76 |
| 1982 | 0 | 0 | 11 | 11 | 56 | 11 | 1 | 3 | 2 | 0 | 2 | 4 | 101 |
| 1983 | 0 | 0 | 4 | 12 | 40 | 23 | 2 | 1 | 0 | 2 | 8 | 0 | 92 |
| 1984 | 0 | 0 | 6 | 23 | 9 | 3 | 0 | 0 | 2 | 6 | 1 | 0 | 50 |
| 1985 | 0 | 2 | 5 | 10 | 6 | 5 | 1 | 0 | 3 | 0 | 4 | 0 | 36 |
| 1986 | 0 | 0 | 2 | 4 | 25 | 1 | 0 | 2 | 7 | 6 | 0 | 0 | 47 |
| 1987 | 0 | 3 | 9 | 0 | 5 | 0 | 1 | 0 | 1 | 0 | 4 | 0 | 23 |
| 1988 | 0 | 0 | 5 | 0 | 2 | 3 | 0 | 0 | 2 | 0 | 5 | 0 | 17 |
| 1989 | 0 | 0 | 2 | 1 | 7 | 6 | 0 | 1 | 1 | 2 | 0 | 0 | 20 |
| 1990 | 0 | 0 | 10 | 3 | 10 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 30 |
| 1991 | 0 | 0 | 17 | 24 | 20 | 4 | 1 | 0 | 0 | 7 | 0 | 0 | 73 |
| 1992 | 0 | 0 | 2 | 9 | 25 | 9 | 2 | 0 | 16 | 1 | 0 | 0 | 64 |
| 1993 | 0 | 0 | 6 | 17 | 20 | 13 | 0 | 0 | 5 | 2 | 1 | 0 | 64 |
| 1994 | 0 | 0 | 1 | 15 | 11 | 2 | 6 | 2 | 0 | 3 | 0 | 0 | 40 |
| 1995 | 0 | 0 | 2 | 22 | 17 | 28 | 6 | 0 | 0 | 4 | 0 | 0 | 79 |
| 1996 | 0 | 0 | 1 | 18 | 9 | 6 | 0 | 6 | 7 | 0 | 1 | 0 | 48 |
| 1997 | 0 | 1 | 1 | 1 | 41 | 5 | 1 | 1 | 2 | 2 | 0 | 0 | 55 |
| 1998 | 0 | 0 | 1 | 1 | 22 | 22 | 2 | 1 | 3 | 27 | 4 | 0 | 83 |
| 1999 | 0 | 1 | 6 | 19 | 90 | 14 | 0 | 1 | 2 | 4 | 5 | 3 | 145 |
| 2000 | 0 | 2 | 15 | 6 | 11 | 3 | 0 | 0 | 0 | 7 | 0 | 0 | 44 |
| 2001 | 0 | 0 | 0 | 10 | 25 | 1 | 0 | 0 | 6 | 19 | 0 | 0 | 61 |
| 2002 | 0 | 0 | 0 | 7 | 7 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 18 |
| 2003 | 0 | 0 | 4 | 15 | 59 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 78 |
| 2004 | 0 | 0 | 12 | 13 | 26 | 4 | 0 | 0 | 0 | 1 | 6 | 0 | 62 |
| 2005 | 0 | 0 | 8 | 7 | 0 | 10 | 0 | 0 | 1 | 1 | 0 | 0 | 27 |
| 2006 | 0 | 0 | 7 | 8 | 4 | 5 | 0 | 0 | 3 | 0 | 0 | 0 | 27 |
| 2007 | 0 | 0 | 5 | 3 | 29 | 5 | 1 | 5 | 0 | 1 | 0 | 0 | 49 |
| 2008 | 4 | 0 | 13 | 9 | 42 | 5 | 0 | 0 | 2 | 0 | 1 | 1 | 77 |
| 2009 | 0 | 6 | 1 | 17 | 4 | 3 | 0 | 1 | 0 | 2 | 0 | 0 | 34 |
| 2010 | 0 | 0 | 2 | 1 | 91 | 4 | 1 | 0 | 3 | 0 | 0 | 1 | 103 |
| 2011 | 0 | 1 | 0 | 50 | 46 | 7 | 0 | 1 | 3 | 0 | 11 | 0 | 119 |
| 2012 | 0 | 0 | 5 | 53 | 4 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 63 |
| Total | 16 | 51 | 254 | 738 | 1348 | 498 | 111 | 87 | 123 | 129 | 94 | 24 | 3473 |
| Avg. | 0.3 | 0.8 | 4.0 | 11.7 | 21.4 | 7.9 | 1.8 | 1.4 | 2.0 | 2.0 | 1.5 | 0.4 | 55.1 |
| Most | 4 | 6 | 17 | 53 | 91 | 28 | 7 | 13 | 16 | 27 | 12 | 4 | 0 |
| When | 1957 1967 2008 |
1975 2009 |
1991 | 2012 | 2010 | 1995 | 1956 | 1979 | 1992 | 1998 | 1958 | 1982 | 1999 |
| Least | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 |
| When | Many Years | Many Years | Many Years | 1987 1988 |
2005 | 1987 2003 2012 |
Many Years | Many Years | Many Years | Many Years | Many Years | Many Years | 1988 |
| Preliminary Numbers for 2013 | |||||||||||||
| 2013 | 2 | 0 | 2 | 12 | - | - | - | - | - | - | - | - | 16 |