Frequencies for first 10,000 rows of fmapsrf variable in natl2001 dataset :

 5 - minute |
Apgar score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.03        0.03
          1 |      9,997       99.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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