Frequencies for first 10,000 rows of prescr5 variable in namcs2004 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        742        7.42        7.42
          2 |        109        1.09        8.51
          3 |         60        0.60        9.11
          . |      9,089       90.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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