| Year | Max Depth (cm) | Date |
|---|---|---|
| 2024 | 64.0 | February 10 |
| 2023 | 55.0 | January 18 |
| 2022 | 47.0 | December 30 |
| 2021 | 52.0 | April 8 |
| 2020 | 53.0 | March 2 |
| 2019 | 48.0 | February 2 |
| 2018 | 40.0 | February 25 |
| 2017 | 57.0 | March 27 |
| 2016 | 47.0 | March 10 |
| 2015 | 45.0 | March 13 |
| 2014 | 41.0 | January 25 |
| 2013 | 42.0 | February 20 |
| 2012 | 44.0 | April 2 |
| 2011 | 28.0 | March 17 |
| 2010 | 42.0 | January 15 |
| 2009 | 62.0 | February 11 |
| 2008 | 63.0 | February 23 |
| 2007 | 56.0 | March 13 |
| 2006 | 40.0 | March 19 |
| 2005 | 66.0 | March 18 |
| 2004 | 45.0 | February 20 |
| 2003 | 36.0 | December 28 |
| 2002 | 49.0 | March 3 |
| 2001 | 69.0 | March 30 |
| 2000 | 44.0 | February 29 |
| 1999 | 43.0 | March 15 |
| 1998 | 39.0 | March 11 |
| 1997 | 44.0 | March 30 |
| 1996 | 39.0 | February 17 |
| 1995 | 55.0 | March 25 |
| 1994 | 49.0 | March 13 |
| 1993 | 37.0 | March 9 |
| 1992 | 70.0 | March 15 |
| 1991 | 59.0 | March 15 |
| 1990 | 46.0 | February 25 |
| 1989 | 38.0 | January 29 |
| 1988 | 45.0 | February 22 |
| 1987 | 35.0 | December 29 |
| 1986 | 48.0 | February 26 |
| 1985 | 53.0 | March 15 |
| 1984 | 25.0 | March 2 |
| 1983 | 46.0 | April 1 |
| 1982 | 39.0 | February 21 |
| 1981 | 35.0 | April 8 |
| 1980 | 39.0 | January 24 |
| 1979 | 45.0 | March 15 |
| 1978 | 34.0 | April 12 |
| 1977 | 45.0 | February 25 |
| 1976 | 53.0 | February 23 |
| 1975 | 71.0 | February 21 |
| 1974 | 58.0 | December 30 |
| 1973 | 58.0 | March 25 |
| 1972 | 58.0 | April 7 |
| 1971 | 33.0 | March 9 |
| 1970 | 33.0 | March 11 |
| 1969 | 28.0 | February 9 |
| 1968 | 33.0 | April 11 |
| 1967 | 41.0 | March 25 |
| 1966 | 46.0 | March 20 |
| 1965 | 33.0 | November 28 |
| 1964 | 28.0 | February 21 |
| 1963 | 33.0 | February 5 |
| 1962 | 41.0 | January 6 |
| 1961 | 46.0 | January 14 |
| 1960 | 48.0 | March 22 |
| 1959 | 43.0 | April 4 |
| 1958 | 81.0 | March 5 |
| 1957 | 74.0 | March 12 |
| 1956 | 68.0 | March 14 |
| 1955 | 69.0 | March 21 |