Frequencies for first 10,000 rows of ncmed1 variable in nhamcsopd2011 dataset :

      Was medication 1 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                        Blank |        191        1.91        1.91
               Not applicable |      3,038       30.38       32.29
                          New |      2,130       21.30       53.59
                    Continued |      4,641       46.41      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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