Frequencies for first 10,000 rows of physasst variable in nhamcsed2011 dataset : Physician | assistant | seen | Freq. Percent Cum. ------------+----------------------------------- No | 8,594 85.94 85.94 Yes | 1,406 14.06 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016