Frequencies for first 10,000 rows of prescr5 variable in namcs1996 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        903        9.03        9.03
          2 |        133        1.33       10.36
          3 |         65        0.65       11.01
          . |      8,899       88.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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