Frequencies for first 10,000 rows of omaps variable in natl1986 dataset :

 One Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          9        0.09        0.09
          1 |         54        0.54        0.63
          2 |         52        0.52        1.15
          3 |         66        0.66        1.81
          4 |         98        0.98        2.79
          5 |        167        1.67        4.46
          6 |        297        2.97        7.43
          7 |        726        7.26       14.69
          8 |      3,431       34.31       49.00
          9 |      4,712       47.12       96.12
         10 |        327        3.27       99.39
         99 |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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