Frequencies for first 10,000 rows of drg3ing4 variable in nhamcsopd2000 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,991       99.91       99.91
      54350 |          1        0.01       99.92
      55105 |          1        0.01       99.93
      55240 |          1        0.01       99.94
      55645 |          1        0.01       99.95
      55755 |          1        0.01       99.96
      55915 |          1        0.01       99.97
      56265 |          1        0.01       99.98
      56310 |          1        0.01       99.99
      70032 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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