Frequencies for first 10,000 rows of contsub5 variable in nhamcsed2009 dataset :

   for rx5, |
 controlled |
  substance |
status code |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         86        0.86        0.86
          3 |         29        0.29        1.15
          4 |         33        0.33        1.48
          5 |          1        0.01        1.49
          6 |        656        6.56        8.05
          7 |         11        0.11        8.16
          8 |          8        0.08        8.24
          . |      9,176       91.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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