The Solar Foundation's National and State Solar Jobs Census 2013 found that the US solar industry employed over 142,000 workers in 2013, a 20% increase from 2012. California employs the most solar workers of any state at over 47,000, representing one third of total US solar employment. The report also found that solar installation jobs make up the largest sector of employment, while manufacturing accounts for the second largest sector. States with the highest growth rates in solar jobs between 2012-2013 included Wyoming, South Dakota, Montana, West Virginia, and Vermont, which all more than doubled their solar employment in that period.