*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 5 | 8 | 28 | 0 | 5 | 46 |
| 1970 | 0 | 0 | 7 | 0 | 0 | 7 |
| 1971 | 0 | 8 | 2 | 0 | 0 | 10 |
| 1972 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1973 | 0 | 0 | 4 | 0 | 0 | 4 |
| 1974 | 0 | 2 | 7 | 0 | 1 | 10 |
| 1975 | 0 | 2 | 3 | 0 | 4 | 9 |
| 1976 | 0 | 3 | 6 | 0 | 5 | 14 |
| 1977 | 0 | 0 | 12 | 0 | 5 | 17 |
| 1978 | 0 | 1 | 5 | 0 | 4 | 10 |
| 1979 | 0 | 2 | 16 | 0 | 7 | 25 |
| 1980 | 1 | 2 | 8 | 0 | 8 | 19 |
| 1981 | 0 | 1 | 7 | 0 | 9 | 17 |
| 1982 | 0 | 3 | 11 | 0 | 11 | 25 |
| 1983 | 0 | 1 | 6 | 0 | 11 | 18 |
| 1984 | 0 | 3 | 4 | 0 | 14 | 21 |
| 1985 | 0 | 3 | 5 | 0 | 16 | 24 |
| 1986 | 0 | 5 | 13 | 0 | 5 | 23 |
| 1987 | 0 | 4 | 21 | 1 | 4 | 30 |
| 1988 | 2 | 8 | 11 | 0 | 7 | 28 |
| 1989 | 0 | 3 | 12 | 0 | 5 | 20 |
| 1990 | 3 | 22 | 13 | 0 | 8 | 46 |
| 1991 | 9 | 29 | 29 | 0 | 6 | 73 |
| 1992 | 7 | 8 | 85 | 1 | 8 | 109 |
| 1993 | 14 | 69 | 212 | 1 | 9 | 305 |
| 1994 | 3 | 157 | 744 | 1 | 15 | 920 |
| 1995 | 5 | 124 | 758 | 1 | 14 | 902 |
| 1996 | 3 | 122 | 590 | 0 | 16 | 731 |
| 1997 | 2 | 155 | 130 | 1 | 18 | 306 |
| 1998 | 3 | 24 | 380 | 0 | 12 | 419 |
| 1999 | 1 | 30 | 41 | 0 | 15 | 87 |
| 2000 | 1 | 58 | 556 | 0 | 21 | 636 |
| 2001 | 2 | 41 | 358 | 0 | 19 | 420 |
| 2002 | 3 | 53 | 460 | 1 | 15 | 532 |
| 2003 | 7 | 72 | 552 | 0 | 16 | 647 |
| 2004 | 2 | 163 | 682 | 0 | 18 | 865 |
| 2005 | 3 | 183 | 170 | 0 | 25 | 381 |
| 2006 | 1 | 83 | 361 | 2 | 25 | 472 |
| 2007 | 7 | 81 | 448 | 4 | 22 | 562 |
| 2008 | 1 | 142 | 355 | 12 | 25 | 535 |
| 2009 | 4 | 187 | 320 | 0 | 40 | 551 |
| 2010 | 9 | 325 | 371 | 1 | 52 | 758 |
| 2011 | 1 | 244 | 536 | 1 | 63 | 845 |
| 2012 | 12 | 605 | 620 | 4 | 129 | 1370 |
| 2013 | 17 | 802 | 681 | 0 | 127 | 1627 |
| 2014 | 11 | 791 | 692 | 1 | 197 | 1692 |
| 2015 | 6 | 848 | 944 | 3 | 335 | 2136 |
| 2016 | 11 | 935 | 1149 | 0 | 354 | 2449 |
| 2017 | 23 | 1102 | 1443 | 1 | 385 | 2954 |
| 2018 | 9 | 1105 | 1509 | 3 | 446 | 3072 |
| 2019 | 21 | 1096 | 1663 | 7 | 408 | 3195 |
| 2020 | 13 | 1264 | 2513 | 4 | 491 | 4285 |
| 2021 | 12 | 1348 | 2224 | 1 | 727 | 4312 |
| 2022 | 11 | 1301 | 2804 | 3 | 597 | 4716 |
| 2023 | 16 | 2052 | 1831 | 0 | 632 | 4531 |
| 2024 | 38 | 2123 | 2249 | 0 | 701 | 5111 |
| 2025 | 1 | 1 | 54 | 0 | 11 | 67 |
| Total | 300 | 17804 | 28716 | 54 | 6123 | 52997 |