Frequencies for first 10,000 rows of med29 variable in nhamcsed2015 dataset :

                         Medication #29 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                          NO ENTRY MADE |      9,997       99.97       99.97
          SULFAMETHOXAZOLE-TRIMETHOPRIM |          1        0.01       99.98
          OXYCODONE HCL & ACETAMINOPHEN |          1        0.01       99.99
                                 FLOMAX |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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