Frequencies for first 10,000 rows of mrace variable in natlterr2007 dataset :

   Mother's |
     Race U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        288        2.88        2.88
          2 |         36        0.36        3.24
          3 |          7        0.07        3.31
          4 |        237        2.37        5.68
          5 |         87        0.87        6.55
          6 |         10        0.10        6.65
          7 |      1,033       10.33       16.98
          8 |      2,292       22.92       39.90
         18 |          1        0.01       39.91
         28 |        154        1.54       41.45
         38 |          1        0.01       41.46
         48 |          3        0.03       41.49
         58 |      1,492       14.92       56.41
         78 |        522        5.22       61.63
          . |      3,837       38.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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