Frequencies for first 10,000 rows of prescr6 variable in nhamcsed1996 dataset :

prescriptio |
   n status |
   code for |
    drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        204        2.04        2.04
          2 |         24        0.24        2.28
          3 |         34        0.34        2.62
          . |      9,738       97.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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