Frequencies for first 10,000 rows of drg5ing3 variable in nhamcsopd2003 dataset :

  ingredient code #3 for medication |
                                 #5 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                           caffeine |          1        0.01        0.01
                 magnesium antacids |          1        0.01        0.02
    potassium replacement solutions |          4        0.04        0.06
                         riboflavin |          4        0.04        0.10
                         sodium ion |          2        0.02        0.12
                          vitamin a |          1        0.01        0.13
                   abacavir sulfate |          2        0.02        0.15
                   atropine sulfate |          1        0.01        0.16
       dextroamphetamine saccharate |          1        0.01        0.17
            oxycodone terephthalate |          2        0.02        0.19
                                  . |      9,981       99.81      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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