Frequencies for first 10,000 rows of prescr6 variable in nhamcsed2002 dataset :

prescriptio |
   n status |
   code for |
    drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        290        2.90        2.90
          2 |         52        0.52        3.42
          3 |         34        0.34        3.76
          . |      9,624       96.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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