Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd1998 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,971       99.71       99.71
      50637 |          1        0.01       99.72
      50745 |          1        0.01       99.73
      53175 |          1        0.01       99.74
      54035 |          1        0.01       99.75
      54328 |          7        0.07       99.82
      54455 |          1        0.01       99.83
      54465 |          3        0.03       99.86
      54595 |          1        0.01       99.87
      54990 |          1        0.01       99.88
      55105 |          3        0.03       99.91
      55130 |          5        0.05       99.96
      55145 |          1        0.01       99.97
      56193 |          1        0.01       99.98
      57058 |          1        0.01       99.99
      59803 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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