Frequencies for first 10,000 rows of omaps variable in natl1993 dataset :

 One Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        0.14        0.14
          1 |         61        0.61        0.75
          2 |         57        0.57        1.32
          3 |         72        0.72        2.04
          4 |         87        0.87        2.91
          5 |        150        1.50        4.41
          6 |        222        2.22        6.63
          7 |        615        6.15       12.78
          8 |      4,109       41.09       53.87
          9 |      4,470       44.70       98.57
         10 |        113        1.13       99.70
         99 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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