April 25, 2024
Great Lakes
Superior
Michigan
Huron
Erie
Ontario
1973
1.0%
1974
5.9%
1975
4.1%
1976
1.2%
1977
9.5%
1978
8.5%
1979
18.4%
1980
5.1%
1981
4.5%
1982
10.7%
1983
5.4%
1984
7.6%
1985
5.9%
1986
1.9%
1987
3.0%
1988
3.0%
1989
3.6%
1990
0.8%
1991
0.4%
1992
2.7%
1993
1.7%
1994
3.6%
1995
0.4%
1996
13.9%
1997
7.4%
1998
0.0%
1999
0.4%
2000
0.0%
2001
0.6%
2002
0.5%
2003
3.9%
2004
0.6%
2005
0.1%
2006
0.0%
2007
0.6%
2008
1.1%
2009
1.1%
2010
0.1%
2011
0.5%
2012
0.0%
2013
2.1%
2014
32.2%
2015
7.4%
2016
0.5%
2017
0.0%
2018
5.1%
2019
2.8%
2020
0.4%
2021
0.0%
2022
1.3%
2023
0.5%
2024
0.0%