Frequencies for first 10,000 rows of prov0480 variable in pos1999 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,428       94.28       94.28
          N |        506        5.06       99.34
          Y |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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