Summer travel usa for S. businesses have no payroll at all, being managed by self-employed persons; because non-employers account for only 3 percent of total business receipts, they are not included in most official statistics. There are strong differences by NAICS-based industries: Ninety percent of businesses in construction employing 85 percent of all construction workers are small businesses, while only 22 percent of utility companies employing 11 percent of all utility workers fall under this designation. Since the 1970s, the number of small firms as a share of all firms has remained rather stable while large firms have generated more employment and sales. In fact, the small-business share of U.S. economic activity, as measured in terms of employment or output, is considerably less than that of comparable businesses in JAPAN, GERMANY, ITALY, the NETHERLANDS, the UNITED KINGDOM, and other European countries (1999 statistics). Summer travel usa 2016.