Frequencies for first 10,000 rows of contsub1 variable in nhamcsed2010 dataset :

Controlled status code for |
                    med #1 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |        746        7.46        7.46
              schedule iii |        551        5.51       12.97
               schedule iv |        243        2.43       15.40
                schedule v |          9        0.09       15.49
                no control |      6,194       61.94       77.43
              undetermined |         64        0.64       78.07
        multiple schedules |         53        0.53       78.60
                         . |      2,140       21.40      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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