Frequencies for first 10,000 rows of prescr5 variable in namcs1994 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        482        4.82        4.82
          2 |         68        0.68        5.50
          3 |         53        0.53        6.03
          . |      9,397       93.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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