Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd2002 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,978       99.78       99.78
      50745 |          1        0.01       99.79
      53175 |          1        0.01       99.80
      53905 |          1        0.01       99.81
      54990 |          1        0.01       99.82
      55105 |          3        0.03       99.85
      55130 |          4        0.04       99.89
      55480 |          2        0.02       99.91
      55710 |          1        0.01       99.92
      55755 |          1        0.01       99.93
      57168 |          1        0.01       99.94
      70020 |          2        0.02       99.96
      70032 |          1        0.01       99.97
      70054 |          1        0.01       99.98
      70626 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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