"Nonprofits Worth $887.3 Billion To U.S. Economy": Nonprofit Times notes there are now approximately 1.44 m nonprofits, an increase of 8.6% in 10 years.
"The tax-exempt sector in the United States represented 5.4 percent of the nation’s gross domestic product (GDP) during 2012, contributing $887.3 billion to the economy. And of those tax-exempt entities, 501(c)(3) public charities accounted for slightly more than three-quarters of the sector’s revenue ($1.65 trillion) and expenses ($1.56 trillion) and more than three-fifths of nonprofit assets ($2.99 trillion) during 2012. Comprised of approximately 1.44 million nonprofits registered with the Internal Revenue Service (IRS) in 2012, the sector has grown approximately 8.6 percent since 2002." -- the Nonprofit Times