Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd1994 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,989       99.89       99.89
      50637 |          1        0.01       99.90
      53175 |          1        0.01       99.91
      53650 |          1        0.01       99.92
      53895 |          1        0.01       99.93
      53915 |          2        0.02       99.95
      54455 |          1        0.01       99.96
      54503 |          1        0.01       99.97
      55130 |          1        0.01       99.98
      55240 |          1        0.01       99.99
      55755 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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