Frequencies for first 10,000 rows of contsub6 variable in nhamcsed2005 dataset :

    controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         24        0.24        0.24
              schedule iii |         23        0.23        0.47
               schedule iv |          9        0.09        0.56
                schedule v |          2        0.02        0.58
                no control |        308        3.08        3.66
              undetermined |         10        0.10        3.76
                         . |      9,624       96.24      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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