Frequencies for first 10,000 rows of prescr5 variable in namcs2003 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        847        8.47        8.47
          2 |        113        1.13        9.60
          3 |         77        0.77       10.37
          . |      8,963       89.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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