A survey of health insurers performed by America's Health Insurance Plans (AHIP) found that 4.5 million Americans were covered by HSA-qualified health plans as of January 2007. Of those, 3.4 million were covered through employer-sponsored plans, and 1.1 million were covered by individually purchased HSA-qualified plans. This represented an increase of 1.3 million since January 2006. In the individual market, 25% of new purchasers bought HSA-qualified plans. HSA-qualified plans represented 17% of new policies sold in the small group market and 8% of new policies sold in the large group market. A follow-up survey by AHIP reported that the number of Americans covered by HSA-qualified plans had grown to 6.1 million as of January 2008 (4.6 million through employer-sponsored plans and 1.5 million covered by individually purchased HSA-qualified plans). HSA-qualified plans represented 27% of new purchases in the individual market, 31% of new enrollment in the small group market and 6% of new enrollment in the large group market.