Frequencies for first 10,000 rows of ncmed2 variable in nhamcsopd2005 dataset :

      was medication 2 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                          new |      1,534       15.34       15.34
                    continued |      2,508       25.08       40.42
               not applicable |      5,801       58.01       98.43
                        blank |        157        1.57      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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