Frequencies for first 10,000 rows of contsub7 variable in nhamcsopd2005 dataset :

controlled status code for |
                    med #7 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               schedule ii |         19        0.19        0.19
              schedule iii |         11        0.11        0.30
               schedule iv |         25        0.25        0.55
                schedule v |          1        0.01        0.56
                no control |        559        5.59        6.15
              undetermined |          9        0.09        6.24
                         . |      9,376       93.76      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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