Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd1995 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        525        5.25        5.25
          2 |         85        0.85        6.10
          3 |         54        0.54        6.64
          . |      9,336       93.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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