April 22, 2025
Great Lakes
Superior
Michigan
Huron
Erie
Ontario
1973
1.2%
1974
8.9%
1975
4.8%
1976
1.4%
1977
14.1%
1978
10.7%
1979
20.4%
1980
6.5%
1981
5.8%
1982
12.3%
1983
5.6%
1984
10.0%
1985
7.1%
1986
3.0%
1987
4.1%
1988
3.2%
1989
6.7%
1990
1.9%
1991
0.9%
1992
3.8%
1993
2.5%
1994
6.1%
1995
0.5%
1996
18.5%
1997
8.4%
1998
0.0%
1999
0.4%
2000
0.1%
2001
1.3%
2002
0.9%
2003
5.4%
2004
1.6%
2005
0.9%
2006
0.2%
2007
1.3%
2008
2.9%
2009
2.4%
2010
0.1%
2011
0.7%
2012
0.0%
2013
3.0%
2014
32.9%
2015
8.8%
2016
0.8%
2017
0.1%
2018
6.2%
2019
6.3%
2020
0.4%
2021
0.1%
2022
2.6%
2023
0.6%
2024
0.0%
2025
0.9%
