Frequencies for first 10,000 rows of rx20cat2 variable in nhamcsed2014 dataset : For RX20, | MULTUM drug | category #2 | - most | detailed | level (can | be either | Level 1,2 | Freq. Percent Cum. ------------+----------------------------------- | 9,995 99.95 99.95 012 | 1 0.01 99.96 180 | 1 0.01 99.97 198 | 1 0.01 99.98 238 | 1 0.01 99.99 385 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 11 Apr 2017