Frequencies for first 10,000 rows of adactyly variable in natl1990 dataset :

Polydactyly |
/Syndactyly |
  /Adactyly |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         16        0.16        0.16
          2 |      9,922       99.22       99.38
          9 |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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