Frequencies for first 10,000 rows of origm variable in natl1988 dataset :

  Origin or |
 Descent of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,874       98.74       98.74
          1 |         22        0.22       98.96
          2 |         11        0.11       99.07
          3 |          1        0.01       99.08
          4 |          7        0.07       99.15
          5 |         16        0.16       99.31
         99 |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016