Frequencies for first 10,000 rows of prov0480 variable in pos2004 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,328       93.28       93.28
          N |        594        5.94       99.22
          Y |         78        0.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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