Frequencies for first 10,000 rows of cephalo variable in natlterr1999 dataset :

Cephalopelv |
         ic |
disproporti |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        677        6.77        6.77
          2 |      9,317       93.17       99.94
          9 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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