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

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          5        0.05        0.05
          1 |         21        0.21        0.26
          2 |          8        0.08        0.34
          3 |          9        0.09        0.43
          4 |          7        0.07        0.50
          5 |         28        0.28        0.78
          6 |         61        0.61        1.39
          7 |        122        1.22        2.61
          8 |        693        6.93        9.54
          9 |      7,319       73.19       82.73
         10 |      1,671       16.71       99.44
         99 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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