The slow, steady decline of unions continued in 2012, when membership shrank by nearly 400,000.
States kept chipping away at unions' power, with the latest blow coming in Michigan, where workers at union-represented employers can now forgo paying dues.
CNNMoney takes a look at unions' recent troubles:
Membership peaked in 1953 and is now at its lowest level in nearly a century.
Women bore the brunt of the decline.
Unions remain more prevalent in government than in private industry.
The decline of union membership has been a key driver of income inequality in recent decades, a new report found.
The drop in unionization accounts for roughly a third of the growth in wage inequality among men and a fifth among women between 1973 and 2007, according to the left-leaning Economic Policy Institute.
The share of the workforce represented by unions declined from 26.7% in 1973 to 13.1% in 2011. This contributed MORETami Luhby - Aug 30, 2012 9:22 AM ET
|Overnight Avg Rate||Latest||Change||Last Week|
|30 yr fixed||3.41%||3.40%|
|15 yr fixed||2.69%||2.68%|
|30 yr refi||3.42%||3.43%|
|15 yr refi||2.70%||2.71%|
Today's featured rates:
|Latest Report||Next Update|
|Home prices||Aug 28|
|Consumer confidence||Aug 28|
|Manufacturing (ISM)||Sept 4|
|Inflation (CPI)||Sept 14|
|Retail sales||Sept 14|
|Associated Press botches Hillary Clinton report and response|
|Top exec at South Korea's Lotte found dead hours before prosecutor questioning|
|Revealed: Fox News' 400-page oppo file on Gabriel Sherman August 26|
|Become a millionaire: time, a savings plan, compound growth|
|Richard Branson bike crash: 'I thought I was going to die'|