Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsed1999 dataset :

 ingredient |
code #4 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,951       99.51       99.51
      50745 |          1        0.01       99.52
      51340 |          2        0.02       99.54
      53175 |          1        0.01       99.55
      53620 |          1        0.01       99.56
      54468 |          1        0.01       99.57
      54713 |         13        0.13       99.70
      55135 |          1        0.01       99.71
      55180 |         17        0.17       99.88
      55548 |          1        0.01       99.89
      55755 |          3        0.03       99.92
      56265 |          7        0.07       99.99
      57170 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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