Frequencies for first 10,000 rows of prescr6 variable in namcs1995 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        369        3.69        3.69
          2 |         33        0.33        4.02
          3 |         26        0.26        4.28
          . |      9,572       95.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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