Frequencies for first 10,000 rows of contsub6 variable in nhamcsed2009 dataset :

   for rx6, |
 controlled |
  substance |
status code |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         38        0.38        0.38
          3 |         30        0.30        0.68
          4 |         17        0.17        0.85
          6 |        365        3.65        4.50
          7 |          5        0.05        4.55
          8 |          7        0.07        4.62
          . |      9,538       95.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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