Frequencies for first 10,000 rows of drug3cl3 variable in nhamcsopd2005 dataset :

          ndc code #3 for medication #3 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         ace inhibitors |          6        0.06        0.06
                        anticonvulsants |         11        0.11        0.17
ocular anti-infective/anti-inflammatory |          3        0.03        0.20
              miscellaneous ophthalmics |          2        0.02        0.22
                   otic, topical (misc) |          1        0.01        0.23
                           antipyretics |         52        0.52        0.75
                          antimalarials |          1        0.01        0.76
   antitussives/expectorants/mucolytics |          1        0.01        0.77
                         antihistamines |         12        0.12        0.89
                          cold remedies |         12        0.12        1.01
                    pharmaceutical aids |          2        0.02        1.03
                          surgical aids |         12        0.12        1.15
                                      . |      9,885       98.85      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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