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

 One Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         10        0.10        0.10
          1 |         52        0.52        0.62
          2 |         52        0.52        1.14
          3 |         67        0.67        1.81
          4 |        113        1.13        2.94
          5 |        204        2.04        4.98
          6 |        355        3.55        8.53
          7 |        795        7.95       16.48
          8 |      2,390       23.90       40.38
          9 |      4,896       48.96       89.34
         10 |      1,005       10.05       99.39
         99 |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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