Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsopd1994 dataset :

 ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,788       97.88       97.88
      55315 |          1        0.01       97.89
      55348 |          2        0.02       97.91
      55755 |         10        0.10       98.01
      55770 |          1        0.01       98.02
      56185 |        179        1.79       99.81
      56193 |          2        0.02       99.83
      56195 |         14        0.14       99.97
      56238 |          1        0.01       99.98
      56265 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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