Frequencies for first 10,000 rows of ncmed2 variable in nhamcsopd2006 dataset :

      was medication 2 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                          New |      1,220       12.20       12.20
                    Continued |      2,901       29.01       41.21
               Not applicable |      5,674       56.74       97.95
                        Blank |        205        2.05      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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