Frequencies for first 10,000 rows of contsub22 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #22 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
                No control |         14        0.14        0.14
                         . |      9,986       99.86      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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