Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd1992 dataset :

 Ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,985       99.85       99.85
      50745 |          4        0.04       99.89
      53175 |          1        0.01       99.90
      54465 |          1        0.01       99.91
      55130 |          6        0.06       99.97
      55240 |          1        0.01       99.98
      55745 |          1        0.01       99.99
      57034 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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