Frequencies for first 10,000 rows of prescr4 variable in namcs1995 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,032       10.32       10.32
          2 |        123        1.23       11.55
          3 |         82        0.82       12.37
          . |      8,763       87.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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