Frequencies for first 10,000 rows of drug7cl2 variable in nhamcsed2003 dataset :

        drug class #2 for medication #7 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |          1        0.01        0.01
                              diuretics |          1        0.01        0.02
               calcium channel blockers |          1        0.01        0.03
                          beta blockers |          2        0.02        0.05
           alpha agonist/alpha blockers |          4        0.04        0.09
                 disorders, acid/peptic |          1        0.01        0.10
                      vitamins/minerals |          1        0.01        0.11
                   dermatologics, misc. |          4        0.04        0.15
                cycloplegics/mydriatics |          1        0.01        0.16
       vertigo/motion sickness/vomiting |          8        0.08        0.24
                   analgesics, narcotic |          1        0.01        0.25
           antimigraine/other headaches |          1        0.01        0.26
                         antiarthritics |          8        0.08        0.34
                                  nsaid |          3        0.03        0.37
                           antipyretics |          9        0.09        0.46
                    pharmaceutical aids |          7        0.07        0.53
                                      . |      9,947       99.47      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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