Frequencies for first 10,000 rows of prescr5 variable in nhamcsed2000 dataset :

prescriptio |
   n status |
   code for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        385        3.85        3.85
          2 |         54        0.54        4.39
          3 |         54        0.54        4.93
          . |      9,507       95.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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