Frequencies for first 10,000 rows of ncmed4 variable in nhamcsopd2011 dataset :

      Was medication 4 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                        Blank |         96        0.96        0.96
               Not applicable |      7,256       72.56       73.52
                          New |        426        4.26       77.78
                    Continued |      2,222       22.22      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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