March 29, 2025
Great Lakes
Superior
Michigan
Huron
Erie
Ontario
1973
3.3%
1974
35.9%
1975
14.3%
1976
13.4%
1977
48.7%
1978
37.6%
1979
46.9%
1980
24.4%
1981
21.8%
1982
32.3%
1983
9.4%
1984
34.9%
1985
23.1%
1986
25.0%
1987
6.3%
1988
20.8%
1989
43.6%
1990
12.0%
1991
7.1%
1992
30.5%
1993
31.2%
1994
40.6%
1995
6.2%
1996
50.5%
1997
38.1%
1998
2.6%
1999
4.6%
2000
1.8%
2001
19.1%
2002
7.7%
2003
43.7%
2004
10.9%
2005
20.5%
2006
5.3%
2007
13.3%
2008
19.1%
2009
19.9%
2010
2.1%
2011
18.3%
2012
0.4%
2013
9.7%
2014
69.0%
2015
51.8%
2016
1.5%
2017
5.6%
2018
19.0%
2019
19.3%
2020
5.6%
2021
2.2%
2022
21.2%
2023
4.1%
2024
0.7%
2025
5.3%
