Frequencies for first 10,000 rows of creat variable in namcs2015 dataset : Creatinine/ | Renal | function | panel | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,869 98.69 98.69 1 | 131 1.31 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 25 Oct 2017