Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsopd2003 dataset :

  ingredient code #5 for medication |
                                 #1 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                         sodium ion |          5        0.05        0.05
                           thiamine |          2        0.02        0.07
                          vitamin a |        167        1.67        1.74
                      cod liver oil |          1        0.01        1.75
                          pertactin |          6        0.06        1.81
                                  . |      9,819       98.19      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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