Frequencies for first 10,000 rows of prescr1 variable in nhamcsopd2000 dataset :

prescriptio |
   n status |
   code for |
 medication |
          # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,702       47.02       47.02
          2 |        677        6.77       53.79
          3 |        617        6.17       59.96
          . |      4,004       40.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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