Frequencies for first 10,000 rows of contsub5 variable in nhamcsopd2010 dataset :

    controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         58        0.58        0.58
              schedule iii |         30        0.30        0.88
               schedule iv |         99        0.99        1.87
                schedule v |          9        0.09        1.96
                no control |      2,027       20.27       22.23
              undetermined |         34        0.34       22.57
        multiple schedules |          7        0.07       22.64
                         . |      7,736       77.36      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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