Frequencies for first 10,000 rows of drg3ing3 variable in nhamcsed1997 dataset :

 ingredient |
code #3 for |
    drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,958       99.58       99.58
      50637 |          1        0.01       99.59
      53175 |          4        0.04       99.63
      54395 |          9        0.09       99.72
      54465 |          5        0.05       99.77
      54595 |          7        0.07       99.84
      54713 |          1        0.01       99.85
      54755 |          1        0.01       99.86
      54990 |          1        0.01       99.87
      55080 |          1        0.01       99.88
      55105 |          1        0.01       99.89
      55240 |         10        0.10       99.99
      55290 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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