Frequencies for first 10,000 rows of fmaps variable in natl1991 dataset :

Five Minute |
Apgar Score |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          8        0.08        0.08
          1 |         16        0.16        0.24
          2 |          8        0.08        0.32
          3 |          9        0.09        0.41
          4 |         19        0.19        0.60
          5 |         22        0.22        0.82
          6 |         63        0.63        1.45
          7 |        127        1.27        2.72
          8 |        602        6.02        8.74
          9 |      7,300       73.00       81.74
         10 |      1,780       17.80       99.54
         99 |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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