Frequencies for first 10,000 rows of fmaps variable in natl2000 dataset :

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.03        0.03
          1 |         17        0.17        0.20
          2 |         10        0.10        0.30
          3 |          9        0.09        0.39
          4 |          6        0.06        0.45
          5 |         32        0.32        0.77
          6 |         53        0.53        1.30
          7 |        113        1.13        2.43
          8 |        605        6.05        8.48
          9 |      8,031       80.31       88.79
         10 |      1,097       10.97       99.76
         99 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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