Frequencies for first 10,000 rows of fracerec variable in natl2009 dataset :

   Father's |
Race Recode |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,370       63.70       63.70
          2 |      1,272       12.72       76.42
          3 |        239        2.39       78.81
          4 |        195        1.95       80.76
          9 |      1,924       19.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015