• In 2015 women held just 16.6% of seats in American corporate boardrooms, even though they make up 56.7%  of the labor-force.
• In most states companies have at least one woman in the boardroom, however few companies have more than three women on their boards — a quantity considered as ‘critical mass.’
• Companies headquartered in states with protective policies for women were more inclined to have an increased share of female directors on their boards.

“Women’s participation in the labor force has soared over the past 50 years, rising from 32% in 1948 to 56.7% as of January.

Yet those gains have not translated into the U.S. corporate boardroom, where women held just 16.6% of seats in 2015, according to a Credit Suisse analysis of the world’s largest 3,400 or so companies. That’s up a little from the 12.7% five years earlier but still disappointingly low.”