Frequencies for first 10,000 rows of contsub5 variable in nhamcsed2005 dataset :

    controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         49        0.49        0.49
              schedule iii |         43        0.43        0.92
               schedule iv |         30        0.30        1.22
                schedule v |          2        0.02        1.24
                no control |        567        5.67        6.91
              undetermined |         16        0.16        7.07
                         . |      9,293       92.93      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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