Frequencies for first 10,000 rows of contsub8 variable in nhamcsopd2010 dataset :

    controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         25        0.25        0.25
              schedule iii |         10        0.10        0.35
               schedule iv |         39        0.39        0.74
                schedule v |          4        0.04        0.78
                no control |        931        9.31       10.09
              undetermined |         19        0.19       10.28
        multiple schedules |          1        0.01       10.29
                         . |      8,971       89.71      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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