Frequencies for first 10,000 rows of prescr5 variable in namcs1997 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        785        7.85        7.85
          2 |        146        1.46        9.31
          3 |         42        0.42        9.73
          . |      9,027       90.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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