Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd2000 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        751        7.51        7.51
          2 |        112        1.12        8.63
          3 |         67        0.67        9.30
          . |      9,070       90.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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