Frequencies for first 10,000 rows of prescr1 variable in nhamcsed2009 dataset :

   for rx1, |
prescriptio |
   n status |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,285       52.85       52.85
          2 |        674        6.74       59.59
          3 |         72        0.72       60.31
          5 |      1,663       16.63       76.94
          . |      2,306       23.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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