Frequencies for first 10,000 rows of incshx variable in nhamcsed2012 dataset :

In the last |
 two years, |
has your ED |
  increased |
 the number |
of standard |
  treatment |
         sp |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        152        1.52        1.52
    Unknown |        624        6.24        7.76
        Yes |      3,364       33.64       41.40
         No |      5,860       58.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016