Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd2001 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,977       99.77       99.77
      50745 |          4        0.04       99.81
      54328 |          6        0.06       99.87
      54350 |          1        0.01       99.88
      55105 |          4        0.04       99.92
      55130 |          3        0.03       99.95
      56345 |          1        0.01       99.96
      59803 |          2        0.02       99.98
      70011 |          1        0.01       99.99
      70404 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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