Frequencies for first 10,000 rows of omaps variable in natl1989 dataset :

 One Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          8        0.08        0.08
          1 |         63        0.63        0.71
          2 |         48        0.48        1.19
          3 |         79        0.79        1.98
          4 |        102        1.02        3.00
          5 |        147        1.47        4.47
          6 |        275        2.75        7.22
          7 |        753        7.53       14.75
          8 |      3,897       38.97       53.72
          9 |      4,423       44.23       97.95
         10 |        146        1.46       99.41
         99 |         59        0.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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