Frequencies for first 10,000 rows of f_uob_otherob variable in natlterr2006 dataset : Other | Obstetric | Procedures | U | Freq. Percent Cum. ------------+----------------------------------- 0 | 5,186 51.86 51.86 1 | 4,814 48.14 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015