Frequencies for first 10,000 rows of prescr2 variable in nhamcsopd1996 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,850       28.50       28.50
          2 |        525        5.25       33.75
          3 |        345        3.45       37.20
          . |      6,280       62.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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