Frequencies for first 10,000 rows of prov0480 variable in pos1994 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,666       96.66       96.66
          N |        275        2.75       99.41
          Y |         59        0.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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