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Past Breakup Dates
| Year | Date of Breakup |
| 2017 | April 25 |
| 2016 | April 19 |
| 2015 | April 14 |
| 2014 | April 27 |
| 2013 | April 29 |
| 2012 | April 22 |
| 2011 | April 23 |
| 2010 | April 15 |
| 2009 | April 18 |
| 2008 | May 2 |
| 2007 | April 19 |
| 2006 | April 19 |
| 2005 | April 21 |
| 2004 | April 24 |
| 2003 | April 22 |
| 2002 | April 29 |
| 2001 | April 26 |
| 2000 | April 25 |
| 1999 | April 18 |
| 1998 | April 19 |
| 1997 | April 20 |
| 1996 | April 16 |
| 1995 | April 22-28 |
| 1994 | April 12 |
| 1993 | April 19 |
| 1992 | April 17 |
| 1991 | April 18 |
| 1990 | April 21 |
| 1989 | April 22 |
| 1988 | April 18 |
| 1987 | April 16 |
| 1986 | April 19 |
| 1985 | April 18 |
| 1983-84 | Data unavailable |
| 1982 | April 26 |
| 1980-81 | Data unavailable |
| 1979 | April 28 |
| 1978 | April 19 |
| 1977 | April 14 |
| 1965-76 | Data unavailable |
| 1964 | April 24 |
| 1963 | April 20 |
| 1962 | April 24 |
| 1961 | May 08 |
| 1960 | April 12 |
| 1959 | April 13 |
| 1958 | April 15 |
| 1957 | prior to May 3 |
| 1956 | April 20 |
| 1955 | April 17 |
| 1954 | May 9 |
| 1953 | April 21 |
| 1951-52 | Data unavailable |
| 1950 | April 28 |
| 1949 | April 15 |
| 1948 | May 01 |
| 1942-47 | Data unavailable |
| 1941 | April 14 |
| 1940 | April 25 |
| 1939 | April 21 |
| 1938 | April 27 |
| 1936 | April 21 |
| 1885 | April 09 |
| 1881 | April 21 |
| 1875 | April 20 |
- Earliest recorded breakup date: April 9
- Latest recorded breakup date: May 9
