Frequencies for first 10,000 rows of prov0480 variable in pos1995 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,599       95.99       95.99
          N |        340        3.40       99.39
          Y |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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