The League of American Orchestras has published Orchestra Facts: 2006-2014, a survey of US orchestra finances and operations.
There is good news and there is bad news, some very bad.
The good news is that 1,224 orchestras contributed $1.8 billion to the U.S. economy in 2014, drawing an audience of nearly 25 million. The bad news: two in three orchestras operated on less than $300,000 a year.
More bad news: audiences declined by 10.5% between 2010 and 2014.
The less bad news: classical concerts declined by just 5.5%.
Mixed news: Three-quarters of all gifts to orchestras were under $250.
You can download the full report here.