Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsopd1996 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,747       97.47       97.47
      51340 |          1        0.01       97.48
      53640 |          1        0.01       97.49
      54238 |          1        0.01       97.50
      54465 |          1        0.01       97.51
      54713 |          4        0.04       97.55
      55105 |          7        0.07       97.62
      55315 |          1        0.01       97.63
      55710 |         29        0.29       97.92
      55755 |        198        1.98       99.90
      55770 |          2        0.02       99.92
      56265 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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