Frequencies for first 10,000 rows of drg7ing3 variable in nhamcsopd2005 dataset :

ingredient code #3 for medication #7 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                            caffeine |          2        0.02        0.02
                            glycerin |          1        0.01        0.03
                    propylene glycol |          1        0.01        0.04
                          riboflavin |          1        0.01        0.05
                              starch |          1        0.01        0.06
                     magnesium oxide |          1        0.01        0.07
               norethindrone acetate |          1        0.01        0.08
                                   . |      9,992       99.92      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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