Frequencies for first 10,000 rows of contsub6 variable in nhamcsopd2005 dataset :

controlled status code for |
                    med #6 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         20        0.20        0.20
              schedule iii |         11        0.11        0.31
               schedule iv |         25        0.25        0.56
                schedule v |          3        0.03        0.59
                no control |        779        7.79        8.38
              undetermined |         12        0.12        8.50
                         . |      9,150       91.50      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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