It looks like the number of workers in the solar industry has surpassed those working in the coal industry. Based on local activity this growth continues unabated. The company that installed our system had 4 full time worker when they installed it a bit over 2 years ago. They now have 35 employees and are booked solid.
http://www.businessinsider.com/us-has-more-solar-workers-than-coal-miners-2014-7
http://www.businessinsider.com/us-has-more-solar-workers-than-coal-miners-2014-7