Frequencies for first 10,000 rows of fmaps variable in natl1996 dataset :

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          6        0.06        0.06
          1 |         31        0.31        0.37
          2 |          9        0.09        0.46
          3 |         10        0.10        0.56
          4 |         17        0.17        0.73
          5 |         20        0.20        0.93
          6 |         53        0.53        1.46
          7 |        110        1.10        2.56
          8 |        643        6.43        8.99
          9 |      7,862       78.62       87.61
         10 |      1,215       12.15       99.76
         99 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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