The new Schaller Consulting study, "Top 10 Drive-to-Work Census Tracts in Manhattan," reveals that 33% of government workers commute to their jobs by car, while only 13% of workers in the finance, insurance and real estate industries and 11% of workers in professional and management services drive to work. 
"Top Ten Drive-to-Work Census Tracts in Manhattan". Prepared for Transportation Alternatives. Schaller Consulting, 2005