Frequencies for first 10,000 rows of fspedyn variable in familyxx2008 dataset :

        any |
children in |
     family |
    receive |
    special |
education/e |
        is? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        379        3.79        3.79
          2 |      3,127       31.27       35.06
          7 |          3        0.03       35.09
          9 |          3        0.03       35.12
          . |      6,488       64.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 May 2016