Frequencies for first 10,000 rows of incphys variable in nhamcsed2008 dataset :

  in last 2 |
 years, has |
       ed's |
   physical |
 space been |
  expanded? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        174        1.74        1.74
    unknown |        242        2.42        4.16
        yes |      2,532       25.32       29.48
         no |      7,052       70.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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