Frequencies for first 10,000 rows of contsub8 variable in nhamcsopd2005 dataset :

controlled status code for |
                    med #8 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         10        0.10        0.10
              schedule iii |         10        0.10        0.20
               schedule iv |         28        0.28        0.48
                schedule v |          2        0.02        0.50
                no control |        355        3.55        4.05
              undetermined |          8        0.08        4.13
                         . |      9,587       95.87      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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