Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd1997 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        507        5.07        5.07
          2 |         65        0.65        5.72
          3 |         48        0.48        6.20
          . |      9,380       93.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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