Frequencies for first 10,000 rows of omaps variable in natl1981 dataset :

 One Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          8        0.08        0.08
          1 |         55        0.55        0.63
          2 |         59        0.59        1.22
          3 |         85        0.85        2.07
          4 |         91        0.91        2.98
          5 |        179        1.79        4.77
          6 |        277        2.77        7.54
          7 |        833        8.33       15.87
          8 |      2,603       26.03       41.90
          9 |      5,091       50.91       92.81
         10 |        633        6.33       99.14
         99 |         86        0.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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