Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd2002 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,979       99.79       99.79
      55348 |          3        0.03       99.82
      55755 |          1        0.01       99.83
      56185 |         15        0.15       99.98
      56265 |          1        0.01       99.99
      70458 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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