Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd1993 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        409        4.09        4.09
          2 |         62        0.62        4.71
          3 |         67        0.67        5.38
          . |      9,462       94.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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