Frequencies for first 10,000 rows of ncmed4 variable in namcs2011 dataset :

      Was medication 4 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                        Blank |         96        0.96        0.96
               Not applicable |      6,963       69.63       70.59
                          New |        535        5.35       75.94
                    Continued |      2,406       24.06      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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