Frequencies for first 10,000 rows of drug7cl2 variable in nhamcsopd2003 dataset :

        drug class #2 for medication #7 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   anesthetics, topical |          1        0.01        0.01
                              diuretics |          9        0.09        0.10
                          beta blockers |          5        0.05        0.15
           alpha agonist/alpha blockers |          8        0.08        0.23
        antispasmodics/anticholinergics |          1        0.01        0.24
                      vitamins/minerals |          4        0.04        0.28
repl/regs of electrolytes/water balance |          1        0.01        0.29
                   estrogens/progestins |          1        0.01        0.30
                      vaccines/antisera |          1        0.01        0.31
                   dermatologics, misc. |          2        0.02        0.33
                     topical analgesics |          9        0.09        0.42
          skeletal muscle hyperactivity |          1        0.01        0.43
      hormonal/biological response mod. |          1        0.01        0.44
       vertigo/motion sickness/vomiting |          9        0.09        0.53
                         antiarthritics |         31        0.31        0.84
                                  nsaid |          7        0.07        0.91
                           antipyretics |          8        0.08        0.99
                         antiprotozoals |          1        0.01        1.00
   antitussives/expectorants/mucolytics |          4        0.04        1.04
        corticosteroid-inhalation/nasal |          1        0.01        1.05
                                      . |      9,895       98.95      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016