Frequencies for first 10,000 rows of contsub27 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #27 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
                No control |          4        0.04        0.04
                         . |      9,996       99.96      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017