Frequencies for first 10,000 rows of drg3ing4 variable in nhamcsopd2002 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,987       99.87       99.87
      53175 |          1        0.01       99.88
      54165 |          1        0.01       99.89
      54330 |          1        0.01       99.90
      55315 |          1        0.01       99.91
      55405 |          1        0.01       99.92
      55755 |          3        0.03       99.95
      56185 |          1        0.01       99.96
      56193 |          1        0.01       99.97
      70439 |          1        0.01       99.98
      70552 |          1        0.01       99.99
      70668 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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