Frequencies for first 10,000 rows of fmaps variable in natl1979 dataset :

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          4        0.04        0.04
          1 |         22        0.22        0.26
          2 |         22        0.22        0.48
          3 |         10        0.10        0.58
          4 |         22        0.22        0.80
          5 |         42        0.42        1.22
          6 |         82        0.82        2.04
          7 |        198        1.98        4.02
          8 |        724        7.24       11.26
          9 |      4,340       43.40       54.66
         10 |      4,472       44.72       99.38
         99 |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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