Frequencies for first 10,000 rows of ncmed7 variable in nhamcsopd2006 dataset :

      was medication 7 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                          New |         62        0.62        0.62
                    Continued |        670        6.70        7.32
               Not applicable |      9,223       92.23       99.55
                        Blank |         45        0.45      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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