Frequencies for first 10,000 rows of uld_cephal variable in natlterr2006 dataset :

Cephalopelv |
         ic |
Disproporti |
     on RFP |
722=f_uld_c |
   ephalo U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         35        0.35        0.35
          2 |      4,699       46.99       47.34
          9 |      1,541       15.41       62.75
          . |      3,725       37.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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