Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd2003 dataset :

  ingredient code #5 for medication |
                                 #2 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                         sodium ion |          2        0.02        0.02
                           thiamine |          1        0.01        0.03
                          vitamin a |         35        0.35        0.38
                          vitamin c |          1        0.01        0.39
  zinc topical agents, external use |          1        0.01        0.40
                   atropine sulfate |          1        0.01        0.41
                   neomycin sulfate |          2        0.02        0.43
                          pertactin |          2        0.02        0.45
                                  . |      9,955       99.55      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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