Frequencies for first 10,000 rows of fmaps variable in natl1980 dataset :

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        0.12        0.12
          1 |         16        0.16        0.28
          2 |         15        0.15        0.43
          3 |         14        0.14        0.57
          4 |         19        0.19        0.76
          5 |         45        0.45        1.21
          6 |         71        0.71        1.92
          7 |        184        1.84        3.76
          8 |        750        7.50       11.26
          9 |      4,827       48.27       59.53
         10 |      3,980       39.80       99.33
         99 |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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