Frequencies for first 10,000 rows of drg3ing3 variable in nhamcsopd1997 dataset :

 ingredient |
code #3 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,959       99.59       99.59
      50637 |          1        0.01       99.60
      50745 |          3        0.03       99.63
      51670 |          1        0.01       99.64
      54325 |          2        0.02       99.66
      54328 |          3        0.03       99.69
      54395 |          1        0.01       99.70
      54465 |          5        0.05       99.75
      54595 |          3        0.03       99.78
      54995 |          1        0.01       99.79
      55105 |         10        0.10       99.89
      55130 |          7        0.07       99.96
      55240 |          1        0.01       99.97
      55755 |          1        0.01       99.98
      56193 |          1        0.01       99.99
      56195 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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