Frequencies for first 10,000 rows of prov0480 variable in pos2003 dataset :

    federal |
    program |
    support |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,356       93.56       93.56
          N |        568        5.68       99.24
          Y |         76        0.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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