| Year | Max Depth (cm) | Date |
|---|---|---|
| 2024 | 8.0 | March 7 |
| 2023 | 20.0 | February 21 |
| 2022 | 19.0 | March 4 |
| 2021 | 6.0 | December 28 |
| 2020 | 5.0 | January 15 |
| 2019 | 15.0 | February 13 |
| 2018 | 17.0 | March 10 |
| 2017 | 15.0 | February 9 |
| 2016 | 9.0 | January 15 |
| 2015 | 15.0 | February 15 |
| 2014 | 31.0 | March 7 |
| 2013 | 47.0 | March 23 |
| 2007 | none | – |
| 2006 | none | – |
| 2005 | 40.0 | January 21 |
| 2004 | 30.0 | December 31 |
| 2003 | 14.0 | November 4 |
| 2002 | 17.0 | April 2 |
| 2001 | 47.0 | February 16 |
| 2000 | 50.0 | December 28 |
| 1999 | 44.0 | March 7 |
| 1998 | 30.0 | March 18 |
| 1997 | 31.0 | January 1 |
| 1996 | 31.0 | December 31 |
| 1995 | 22.0 | December 2 |
| 1994 | 33.0 | January 29 |
| 1993 | 19.0 | December 27 |
| 1992 | 15.0 | February 24 |
| 1991 | 21.0 | December 13 |
| 1990 | 18.0 | March 16 |
| 1989 | 23.0 | January 11 |
| 1988 | 13.0 | December 31 |
| 1987 | 15.0 | February 2 |
| 1986 | 24.0 | February 23 |
| 1985 | 23.0 | January 1 |
| 1984 | 25.0 | October 17 |
| 1983 | 22.0 | March 7 |
| 1982 | 36.0 | January 25 |
| 1981 | 20.0 | December 3 |
| 1980 | 31.0 | March 15 |
| 1979 | 38.0 | February 13 |
| 1978 | 33.0 | January 6 |
| 1977 | 33.0 | December 30 |
| 1976 | 43.0 | March 11 |
| 1975 | 30.0 | February 13 |
| 1974 | 53.0 | March 25 |
| 1973 | 46.0 | December 14 |
| 1972 | 48.0 | March 1 |
| 1971 | 28.0 | January 29 |
| 1970 | 38.0 | February 17 |
| 1969 | 51.0 | February 1 |
| 1968 | 20.0 | December 29 |
| 1967 | 51.0 | February 5 |
| 1966 | 38.0 | January 7 |
| 1965 | 38.0 | January 1 |
| 1964 | 38.0 | December 28 |
| 1963 | 13.0 | March 9 |
| 1962 | 33.0 | March 12 |
| 1961 | 20.0 | February 26 |
| 1960 | 41.0 | January 13 |
| 1959 | 30.0 | February 12 |
| 1958 | 25.0 | December 23 |
| 1957 | 18.0 | October 24 |
| 1956 | 71.0 | March 16 |
| 1955 | 50.0 | March 26 |