Frequencies for first 10,000 rows of contsub3 variable in nhamcsopd2005 dataset :

controlled status code for |
                    med #3 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         51        0.51        0.51
              schedule iii |         43        0.43        0.94
               schedule iv |        110        1.10        2.04
                schedule v |          5        0.05        2.09
                no control |      2,445       24.45       26.54
              undetermined |         48        0.48       27.02
                         . |      7,298       72.98      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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