Frequencies for first 10,000 rows of contsub5 variable in nhamcsed2010 dataset :

    Controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         96        0.96        0.96
              schedule iii |         70        0.70        1.66
               schedule iv |         32        0.32        1.98
                schedule v |          1        0.01        1.99
                no control |        858        8.58       10.57
              undetermined |          9        0.09       10.66
        multiple schedules |          6        0.06       10.72
                         . |      8,928       89.28      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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