Frequencies for first 10,000 rows of drug6cl3 variable in nhamcsopd2005 dataset :

          ndc code #3 for medication #6 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                           antipyretics |         32        0.32        0.32
                         antiprotozoals |          1        0.01        0.33
                         antihistamines |          4        0.04        0.37
                          cold remedies |          1        0.01        0.38
                          surgical aids |          4        0.04        0.42
                                      . |      9,958       99.58      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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