Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd1996 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        631        6.31        6.31
          2 |         86        0.86        7.17
          3 |         58        0.58        7.75
          . |      9,225       92.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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