Frequencies for first 10,000 rows of physasst variable in nhamcsed2012 dataset : Physician | assistant | seen | Freq. Percent Cum. ------------+----------------------------------- No | 8,201 82.01 82.01 Yes | 1,799 17.99 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 7 Nov 2016