Frequencies for first 10,000 rows of medasst variable in namcs1996 dataset : medical | assistant | seen | Freq. Percent Cum. ------------+----------------------------------- 0 | 7,414 74.14 74.14 1 | 2,586 25.86 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016