Frequencies for first 10,000 rows of prescr7 variable in namcs2004 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        395        3.95        3.95
          2 |         57        0.57        4.52
          3 |         34        0.34        4.86
          . |      9,514       95.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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