Frequencies for first 10,000 rows of prescr5 variable in nhamcsed1992 dataset :

Prescriptio |
   n status |
   code for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        183        1.83        1.83
          2 |         23        0.23        2.06
          3 |         35        0.35        2.41
          . |      9,759       97.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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