Frequencies for first 10,000 rows of prov0480 variable in pos2007 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,279       92.79       92.79
          N |        643        6.43       99.22
          Y |         78        0.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016