Frequencies for first 10,000 rows of contsub6 variable in nhamcsed2010 dataset :

    Controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         47        0.47        0.47
              schedule iii |         31        0.31        0.78
               schedule iv |         17        0.17        0.95
                schedule v |          2        0.02        0.97
                no control |        470        4.70        5.67
              undetermined |          5        0.05        5.72
        multiple schedules |          2        0.02        5.74
                         . |      9,426       94.26      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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