| Year | Max Depth (cm) | Date |
|---|---|---|
| 2014 | 83.1 | March 28 |
| 2013 | 66.0 | February 24 |
| 2012 | 77.0 | March 4 |
| 2011 | 75.0 | February 14 |
| 2010 | 47.0 | December 19 |
| 2009 | 70.0 | February 23 |
| 2008 | 65.0 | December 25 |
| 2007 | 52.0 | February 3 |
| 2006 | 115.0 | February 24 |
| 2005 | 62.0 | March 13 |
| 2004 | 70.0 | February 11 |
| 2003 | 83.0 | March 15 |
| 2002 | 84.0 | March 3 |
| 2001 | 95.0 | March 14 |
| 2000 | 62.0 | February 21 |
| 1999 | 41.0 | January 16 |
| 1998 | 55.0 | January 30 |
| 1997 | 120.0 | February 28 |
| 1996 | 58.0 | February 11 |
| 1995 | 54.0 | December 16 |
| 1994 | 67.0 | February 7 |
| 1993 | 45.0 | March 22 |
| 1992 | 82.0 | March 17 |
| 1991 | 62.0 | February 24 |
| 1990 | 89.0 | January 17 |
| 1989 | 84.0 | December 28 |
| 1988 | 69.0 | March 14 |
| 1987 | 62.0 | February 8 |
| 1986 | 61.0 | March 10 |
| 1985 | 71.0 | March 5 |
| 1984 | 81.0 | February 6 |
| 1983 | 45.0 | December 31 |
| 1982 | 75.0 | March 5 |
| 1981 | 76.0 | February 8 |
| 1980 | 62.0 | March 15 |
| 1979 | 98.0 | January 25 |
| 1978 | 87.0 | March 24 |
| 1977 | 105.0 | March 7 |
| 1976 | 86.0 | March 19 |
| 1975 | 81.0 | February 8 |
| 1974 | 76.0 | March 1 |
| 1973 | 69.0 | January 5 |
| 1972 | 99.0 | March 2 |
| 1971 | 102.0 | March 8 |
| 1970 | 71.0 | March 28 |
| 1969 | 74.0 | January 10 |
| 1968 | 53.0 | December 29 |
| 1967 | 81.0 | February 28 |
| 1966 | 53.0 | February 1 |
| 1965 | 58.0 | February 28 |
| 1964 | 48.0 | February 26 |
| 1963 | 74.0 | February 24 |
| 1962 | 79.0 | March 1 |
| 1961 | 46.0 | January 8 |
| 1960 | 74.0 | February 10 |
| 1959 | 84.0 | March 7 |
| 1958 | 43.0 | December 28 |
| 1957 | 58.0 | January 18 |
| 1956 | 79.0 | March 14 |
| 1955 | 69.0 | January 27 |