Act 10 and so-called "Right-to-Work" clobbered Wisconsin unions: Share of the workforce in a union, United States, Minnesota, and Wisconsin, 1989–2017
| United States | Wisconsin | Minnesota | |
|---|---|---|---|
| 1989 | 16.4% | 20.9% | 19.9% |
| 1990 | 16.0% | 20.5% | 20.1% |
| 1991 | 16.0% | 20.8% | 21.4% |
| 1992 | 15.7% | 19.8% | 22.0% |
| 1993 | 15.7% | 19.4% | 21.1% |
| 1994 | |||
| 1995 | 14.9% | 17.7% | 20.3% |
| 1996 | 14.5% | 18.9% | 20.2% |
| 1997 | 14.1% | 18.8% | 19.9% |
| 1998 | 13.9% | 18.7% | 18.8% |
| 1999 | 13.9% | 18.0% | 19.3% |
| 2000 | 13.5% | 17.6% | 18.2% |
| 2001 | 13.4% | 16.2% | 17.6% |
| 2002 | 13.3% | 15.6% | 17.6% |
| 2003 | 12.9% | 15.9% | 17.0% |
| 2004 | 12.5% | 16.0% | 17.5% |
| 2005 | 12.5% | 16.1% | 15.7% |
| 2006 | 12.0% | 14.9% | 16.0% |
| 2007 | 12.1% | 14.3% | 16.3% |
| 2008 | 12.4% | 15.0% | 16.1% |
| 2009 | 12.3% | 15.2% | 15.1% |
| 2010 | 11.9% | 14.2% | 15.6% |
| 2011 | 11.8% | 13.3% | 15.1% |
| 2012 | 11.3% | 11.2% | 14.2% |
| 2013 | 11.3% | 12.3% | 14.3% |
| 2014 | 11.10% | 11.7% | 14.2% |
| 2015 | 11.1% | 8.3% | 14.2% |
| 2016 | 10.7% | 8.1% | 14.2% |
| 2017 | 10.7% | 8.3% | 15.2% |
Source: EPI analysis of Bureau of Labor Statistics union membership data
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