Frequencies for first 10,000 rows of contsub30 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #30 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
                No control |          2        0.02        0.02
                         . |      9,998       99.98      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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