Number of U.S. spas (2007): 14,615

Revenue (2006): $9.4 billion, down 3 percent from previous year

Spa visits (2006): 110 million, a decline of 16 percent from previous year

Active spa-goers: 32 million

In total: 1 in 4 Americans has been to a spa

Employees: 234, 600 (118,00 full-time; 73,600 part-time; 42,900 contract)

Top growth areas by spa type: Medical (19%), resort/hotel (16%), destination (13%)

Source: International Spa Association