Frequencies for first 10,000 rows of med23 variable in nhamcsed2014 dataset :

                          Medication 23 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                          NO ENTRY MADE |      9,987       99.87       99.87
                                DEPACON |          1        0.01       99.88
                                 ATIVAN |          1        0.01       99.89
                        DOCUSATE -SENNA |          1        0.01       99.90
                              LACTULOSE |          1        0.01       99.91
                                LANOXIN |          1        0.01       99.92
                             METOPROLOL |          1        0.01       99.93
                                MYLICON |          1        0.01       99.94
                                TYLENOL |          1        0.01       99.95
                             VANCOMYCIN |          1        0.01       99.96
                               WARFARIN |          1        0.01       99.97
           HYDROCORTISONE SOD SUCCINATE |          1        0.01       99.98
                                 AMBIEN |          2        0.02      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017