Frequencies for first 10,000 rows of drug5cl2 variable in nhamcsopd2003 dataset :

        drug class #2 for medication #5 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |          4        0.04        0.04
                   anesthetics, topical |          2        0.02        0.06
                antihypertensive agents |          1        0.01        0.07
                              diuretics |          8        0.08        0.15
               calcium channel blockers |          1        0.01        0.16
                          beta blockers |          6        0.06        0.22
           alpha agonist/alpha blockers |          7        0.07        0.29
                         antidiarrheals |          1        0.01        0.30
        antispasmodics/anticholinergics |          1        0.01        0.31
                      vitamins/minerals |          7        0.07        0.38
repl/regs of electrolytes/water balance |          1        0.01        0.39
                          immune serums |          1        0.01        0.40
                   dermatologics, misc. |          1        0.01        0.41
                     topical analgesics |         13        0.13        0.54
          skeletal muscle hyperactivity |          1        0.01        0.55
      hormonal/biological response mod. |          1        0.01        0.56
              miscellaneous ophthalmics |          1        0.01        0.57
       vertigo/motion sickness/vomiting |         16        0.16        0.73
                   analgesics, narcotic |          3        0.03        0.76
               analgesics, non-narcotic |          1        0.01        0.77
                         antiarthritics |         45        0.45        1.22
                                  nsaid |         13        0.13        1.35
                           antipyretics |         12        0.12        1.47
   antitussives/expectorants/mucolytics |          1        0.01        1.48
                         antihistamines |          1        0.01        1.49
        corticosteroid-inhalation/nasal |          2        0.02        1.51
                                      . |      9,849       98.49      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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