| Union Membership, Coverage, Density, and Employment: | |||||||
| Local Workers | |||||||
| Year | Sample Size | Wage | At Cap | Union Wage | Nonunion Wage | Unadjusted Union Wage Prem. | Adjusted Union Wage Prem. |
| 1983 | 15,143 | $8.27 | 0.5% | $9.65 | $7.25 | 33.1% | 11.2% |
| 1984 | 14,883 | $8.82 | 0.9% | $10.31 | $7.75 | 33.1% | 12.1% |
| 1985 | 14,827 | $9.34 | 1.1% | $10.72 | $8.32 | 28.9% | 10.5% |
| 1986 | 15,074 | $9.75 | 1.3% | $11.43 | $8.54 | 33.9% | 13.2% |
| 1987 | 14,758 | $10.31 | 2.0% | $12.19 | $8.98 | 35.9% | 13.4% |
| 1988 | 14,235 | $10.90 | 3.1% | $12.97 | $9.38 | 38.3% | 13.6% |
| 1989 | 14,200 | $11.38 | 0.1% | $13.33 | $9.92 | 34.4% | 12.6% |
| 1990 | 15,109 | $11.87 | 0.2% | $14.16 | $10.19 | 38.9% | 15.1% |
| 1991 | 14,968 | $12.26 | 0.1% | $14.56 | $10.60 | 37.3% | 13.3% |
| 1992 | 14,496 | $12.75 | 0.3% | $15.09 | $11.05 | 36.6% | 13.5% |
| 1993 | 14,380 | $13.13 | 0.2% | $15.50 | $11.30 | 37.1% | 15.0% |
| 1994 | 15,454 | $14.05 | 0.6% | $16.52 | $12.05 | 37.1% | 19.3% |
| 1995 | 15,099 | $14.32 | 0.6% | $16.84 | $12.34 | 36.5% | 16.8% |
| 1996 | 10,808 | $14.65 | 0.5% | $17.72 | $12.22 | 45.0% | 16.9% |
| 1997 | 10,920 | $15.09 | 0.7% | $18.20 | $12.68 | 43.5% | 17.3% |
| 1998 | 10,609 | $15.50 | 0.2% | $18.48 | $13.10 | 41.0% | 18.0% |
| 1999 | 10,565 | $16.12 | 0.3% | $19.08 | $13.75 | 38.8% | 20.0% |
| 2000 | 10,095 | $16.70 | 0.3% | $19.54 | $14.44 | 35.2% | 17.9% |
| 2001 | 10,418 | $17.23 | 0.2% | $20.24 | $14.81 | 36.6% | 19.7% |
| 2002 | 11,712 | $17.80 | 0.2% | $20.82 | $15.38 | 35.4% | 13.2% |
| 2003 | 11,434 | $18.53 | 0.4% | $21.80 | $15.89 | 37.2% | 18.1% |
| 2004 | 11,173 | $19.16 | 0.5% | $22.49 | $16.54 | 35.9% | 14.8% |
| 2005 | 11,206 | $19.23 | 0.2% | $22.66 | $16.52 | 37.2% | 16.4% |
| 2006 | 10,913 | $19.94 | 0.4% | $23.12 | $17.41 | 32.8% | 16.9% |
| 2007 | 11,081 | $20.69 | 0.5% | $24.16 | $17.96 | 34.6% | 16.3% |
| 2008 | 11,203 | $21.56 | 0.7% | $24.74 | $19.06 | 29.8% | 14.8% |
| 2009 | 11,008 | $21.92 | 0.8% | $25.37 | $19.03 | 33.3% | 13.1% |
| 2010 | 10,260 | $22.63 | 0.9% | $26.27 | $19.65 | 33.7% | 13.6% |
| 2011 | 9,741 | $22.99 | 0.9% | $26.76 | $19.86 | 34.7% | 16.4% |
| 2012 | 9,633 | $22.88 | 0.9% | $26.94 | $19.71 | 36.7% | 15.9% |
| 2013 | 9,088 | $23.04 | 1.0% | $27.11 | $19.95 | 35.9% | 16.0% |
| 2014 | 8,958 | $23.82 | 1.1% | $27.79 | $20.79 | 33.7% | 16.6% |
| 2015 | 8,086 | $24.96 | 1.7% | $29.11 | $21.65 | 34.4% | 13.9% |
| 2016 | 7,998 | $25.17 | 1.5% | $29.62 | $21.75 | 36.2% | 16.8% |
| 2017 | 7,926 | $25.84 | 1.8% | $30.00 | $22.82 | 31.4% | 13.4% |
| 2018 | 7,652 | $26.35 | 1.8% | $30.82 | $23.03 | 33.8% | 15.5% |
| 2019 | 7,242 | $26.74 | 1.8% | $31.41 | $23.31 | 34.7% | 15.1% |
| 2020 | 6,614 | $29.05 | 2.5% | $33.21 | $25.70 | 29.2% | 12.3% |
| 2021 | 6,396 | $30.05 | 2.7% | $34.12 | $26.92 | 26.7% | 10.1% |
| 2022 | 6,179 | $31.59 | 3.3% | $36.87 | $27.99 | 31.8% | 12.5% |
| 2023 | 5,943 | $33.07 | 2.4% | $38.50 | $29.35 | 31.2% | 8.6% |
| Copyright 2024 by Barry T. Hirsch, David A. Macpherson, and William E. Even. The use of this data requires citation. | |||||||