Frequencies for first 10,000 rows of incshx variable in nhamcsed2011 dataset :

In the last |
 two years, |
has your ED |
  increased |
 the number |
of standard |
  treatment |
         sp |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |        305        3.05        3.05
        Yes |      3,291       32.91       35.96
         No |      6,404       64.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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