Frequencies for first 10,000 rows of refothph variable in nhamcsed1992 dataset : Refer to | other | physician/c | linic | Freq. Percent Cum. ------------+----------------------------------- 0 | 5,468 54.68 54.68 1 | 4,532 45.32 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016