Percent of net employment growth by size of firms, March 2006-June 2006 (seasonally adjusted) Firm Size Percent (number of employees) 1-4 2.1 5-9 2.4 10-19 6.4 20-49 17.0 50-99 12.5 100-249 17.8 250-499 12.7 500-999 10.8 1,000 or more 18.3