Frequencies for first 10,000 rows of prescr8 variable in nhamcsed2009 dataset :

   for rx8, |
prescriptio |
   n status |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        113        1.13        1.13
          2 |          6        0.06        1.19
          3 |          3        0.03        1.22
          5 |         25        0.25        1.47
          . |      9,853       98.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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