Frequencies for first 10,000 rows of ncmed1 variable in nhamcsopd2006 dataset :

      was medication 1 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                          New |      2,343       23.43       23.43
                    Continued |      4,054       40.54       63.97
               Not applicable |      3,320       33.20       97.17
                        Blank |        283        2.83      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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