Frequencies for first 10,000 rows of prescr5 variable in nhamcsed1995 dataset :

prescriptio |
   n status |
   code for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        280        2.80        2.80
          2 |         57        0.57        3.37
          3 |         40        0.40        3.77
          . |      9,623       96.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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