Frequencies for first 10,000 rows of med21 variable in nhamcsed2014 dataset :

                          Medication 21 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                          NO ENTRY MADE |      9,981       99.81       99.81
                          ADVAIR DISKUS |          1        0.01       99.82
                         HEPARIN SODIUM |          1        0.01       99.83
                               BENADRYL |          1        0.01       99.84
                            BUPIVACAINE |          1        0.01       99.85
                               COUMADIN |          1        0.01       99.86
                  ALBUTEROL/IPRATROPIUM |          1        0.01       99.87
                               DILAUDID |          1        0.01       99.88
                          LEVOTHYROXINE |          1        0.01       99.89
                               MORPHINE |          1        0.01       99.90
                             PREDNISONE |          1        0.01       99.91
                                  SENNA |          1        0.01       99.92
                        SODIUM CHLORIDE |          1        0.01       99.93
                              VITAMIN E |          1        0.01       99.94
                          NORMAL SALINE |          1        0.01       99.95
                                 ALTACE |          1        0.01       99.96
                              RISPERDAL |          1        0.01       99.97
                             ATOVAQUONE |          1        0.01       99.98
                                ZEMURON |          1        0.01       99.99
                              ILLEGIBLE |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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