Frequencies for first 10,000 rows of owner variable in nhamcsed2001 dataset : hospital | ownership | Freq. Percent Cum. ------------+----------------------------------- 1 | 7,976 79.76 79.76 2 | 1,762 17.62 97.38 3 | 262 2.62 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016