Directions:
- Mouse over the years on the timeline to see the number of workers in the region.
- Mouse over the states for graphs showing the dominant manufacturing industries in that year.
- Click "Open Chart View" to activate alternate view.
1870
1885
1900
1915
1930
1945
1960
1975
1990
2005
2020
= 15,000 workers
Green = increase from previous date
Red = decrease from previous date
1700
1814
1816
1817
1833
1840-60
1871
1890s
1901
1901
1915
1914-18
1930
1941
1942
1950s
1950-91
1970s-80
1974
1978
1982
1980
1982
1984
1986
1992
1995
1998
Illinois
Indiana
Michigan
Ohio
Pennsylvania
Wisconsin