Frequencies for first 10,000 rows of prescr6 variable in namcs2003 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        615        6.15        6.15
          2 |         72        0.72        6.87
          3 |         52        0.52        7.39
          . |      9,261       92.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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