Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsopd1999 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,969       99.69       99.69
      53620 |          2        0.02       99.71
      54330 |          1        0.01       99.72
      54468 |          2        0.02       99.74
      54713 |          2        0.02       99.76
      54755 |          2        0.02       99.78
      54960 |          2        0.02       99.80
      55105 |          1        0.01       99.81
      55180 |          2        0.02       99.83
      55710 |          1        0.01       99.84
      55755 |         10        0.10       99.94
      55770 |          1        0.01       99.95
      56265 |          3        0.03       99.98
      56285 |          1        0.01       99.99
      57170 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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