A: It is estimated that 2-3 million Americans are currently co-employed in a PEO arrangement. The average PEO has grown more than 20 percent per year for each of the last six years, according to a survey of NAPEO members. About 700 PEOs that offer a wide array of employment services and benefits are operating today in 50 states. The PEO industry generates approximately $51 billion in gross revenues annually. PEOs have an 88 percent client retention rate due to strong client satisfaction. NAPEO member companies are estimated to account for more than 70 percent of the industry's gross revenues.