Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsed2001 dataset :

 ingredient |
code #4 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,952       99.52       99.52
      53175 |          2        0.02       99.54
      53325 |          1        0.01       99.55
      54713 |         15        0.15       99.70
      54960 |          1        0.01       99.71
      55218 |          1        0.01       99.72
      55755 |         19        0.19       99.91
      70011 |          1        0.01       99.92
      70120 |          5        0.05       99.97
      70260 |          2        0.02       99.99
      70418 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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