Frequencies for first 10,000 rows of med30 variable in nhamcsed2015 dataset :

                         Medication #30 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                          NO ENTRY MADE |      9,998       99.98       99.98
                               MYFORTIC |          1        0.01       99.99
                     POTASSIUM CHLORIDE |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017