Frequencies for first 10,000 rows of drug5cl2 variable in nhamcsopd2005 dataset :

          ndc code #2 for medication #5 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                              diuretics |         11        0.11        0.11
               calcium channel blockers |          1        0.01        0.12
                          beta blockers |          7        0.07        0.19
           alpha agonist/alpha blockers |          8        0.08        0.27
                         antidiarrheals |          1        0.01        0.28
                      vitamins/minerals |          5        0.05        0.33
                         contraceptives |          1        0.01        0.34
                      vaccines/antisera |          1        0.01        0.35
                   dermatologics, misc. |          3        0.03        0.38
                     topical analgesics |          4        0.04        0.42
          skeletal muscle hyperactivity |          3        0.03        0.45
       vertigo/motion sickness/vomiting |          5        0.05        0.50
                         antiarthritics |         47        0.47        0.97
                                  nsaid |         13        0.13        1.10
                           antipyretics |         26        0.26        1.36
   antitussives/expectorants/mucolytics |          6        0.06        1.42
                         antihistamines |          2        0.02        1.44
        corticosteroid-inhalation/nasal |          1        0.01        1.45
                                      . |      9,855       98.55      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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