According to that article, U.S. Bureau of Labor Statistics, Employment Projections program says:
<< The number of people attending musical performances, such as orchestra, opera, and rock concerts, is expected to increase from 2010 to 2020. As a result, more musicians and singers will be needed to play at these performances. >>
Really, US Government, opera in the USA is a growth industry?? Electronic Dance Music (EDM) is the only 'growth' sector in the live concert business right now — its fan base is young and diverse. Most reading this list would not consideri it 'music', either. Opera: not growing, shrinking, fan base dying off. Attendance ten years hence will not be requiring more singers and pit musicians.
P.S. Saw Don Giovanni two nights ago at LA Opera. Very, very good. Ildebrando D'Arcangelo is the real deal. He's the Don on the new Nezet-Seguin recording, too, btw.
http://tiny.cc/468ulw