Frequencies for first 10,000 rows of incshx variable in nhamcsed2009 dataset :

  in last 2 |
 years, has |
         ed |
increased # |
of standard |
  treatment |
    spaces? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |         42        0.42        0.42
         -8 |        474        4.74        5.16
          1 |      2,715       27.15       32.31
          2 |      6,769       67.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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