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

      plans to |
   extend ed's |
physical space |
    within the |
 next 2 years? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        174        1.74        1.74
       unknown |        962        9.62       11.36
not applicable |      2,532       25.32       36.68
           yes |      2,486       24.86       61.54
            no |      3,846       38.46      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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