Frequencies for first 10,000 rows of drg4ing3 variable in namcs2003 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,974       99.74       99.74
      50745 |          4        0.04       99.78
      54193 |          1        0.01       99.79
      54960 |          1        0.01       99.80
      55105 |          2        0.02       99.82
      55130 |          1        0.01       99.83
      55755 |          1        0.01       99.84
      55770 |          1        0.01       99.85
      56340 |          1        0.01       99.86
      70256 |          1        0.01       99.87
      70259 |          4        0.04       99.91
      70338 |          1        0.01       99.92
      70358 |          2        0.02       99.94
      70370 |          1        0.01       99.95
      70401 |          1        0.01       99.96
      70493 |          2        0.02       99.98
      70626 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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