Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd2002 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        716        7.16        7.16
          2 |         87        0.87        8.03
          3 |         66        0.66        8.69
          . |      9,131       91.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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