Frequencies for first 10,000 rows of contsub7 variable in nhamcsopd2010 dataset :

    controlled status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         36        0.36        0.36
              schedule iii |         16        0.16        0.52
               schedule iv |         60        0.60        1.12
                schedule v |          6        0.06        1.18
                no control |      1,259       12.59       13.77
              undetermined |         20        0.20       13.97
        multiple schedules |          3        0.03       14.00
                         . |      8,600       86.00      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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