Frequencies for first 10,000 rows of contsub8 variable in nhamcsed2009 dataset :

   for rx8, |
 controlled |
  substance |
status code |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          7        0.07        0.07
          3 |         11        0.11        0.18
          4 |          8        0.08        0.26
          6 |        118        1.18        1.44
          7 |          2        0.02        1.46
          8 |          1        0.01        1.47
          . |      9,853       98.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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