Frequencies for first 10,000 rows of prescr4 variable in namcs2004 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,070       10.70       10.70
          2 |        151        1.51       12.21
          3 |         81        0.81       13.02
          . |      8,698       86.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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