Frequencies for first 10,000 rows of prescr6 variable in nhamcsed2009 dataset :

   for rx6, |
prescriptio |
   n status |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        351        3.51        3.51
          2 |         20        0.20        3.71
          3 |          6        0.06        3.77
          5 |         85        0.85        4.62
          . |      9,538       95.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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