Frequencies for first 10,000 rows of expspace variable in nhamcsed2006 dataset :

   plans to |
extend ed's |
   physical |
      space |
 within the |
     next 2 |
     years? |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |      2,240       22.40       22.40
         no |      4,013       40.13       62.53
    unknown |      1,403       14.03       76.56
      blank |        212        2.12       78.68
          8 |      2,132       21.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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