Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsed1995 dataset :

 ingredient |
code #3 for |
    drug #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,982       99.82       99.82
      50745 |          1        0.01       99.83
      52908 |          1        0.01       99.84
      53175 |          1        0.01       99.85
      54395 |          5        0.05       99.90
      54465 |          1        0.01       99.91
      54595 |          2        0.02       99.93
      54960 |          2        0.02       99.95
      54995 |          2        0.02       99.97
      55240 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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