Frequencies for first 10,000 rows of prescr1 variable in nhamcsopd1998 dataset :

prescriptio |
   n status |
   code for |
 medication |
          # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,835       48.35       48.35
          2 |        907        9.07       57.42
          3 |        653        6.53       63.95
          . |      3,605       36.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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