Original: After incorporation as a private for-profit company in 1999, Craigslist expanded into nine more U.S. cities in 2000, four in 2001 and 2002 each, and 14 in 2003.
Simplified: After incorporation as a private for-profit company in 1999, Craigslist expanded into nine more U.S. cities in 2000, four each in 2001 and 2002, and 14 in 2003.