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

    Date of |
 Last Fetal |
    Death - |
       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         63 |          1        0.01        0.01
         65 |          2        0.02        0.03
         66 |          2        0.02        0.05
         68 |          3        0.03        0.08
         69 |          6        0.06        0.14
         70 |          3        0.03        0.17
         71 |          9        0.09        0.26
         72 |         12        0.12        0.38
         73 |          9        0.09        0.47
         74 |         20        0.20        0.67
         75 |         37        0.37        1.04
         76 |         35        0.35        1.39
         77 |      8,210       82.10       83.49
         78 |         65        0.65       84.14
         79 |        107        1.07       85.21
         80 |        135        1.35       86.56
         81 |        142        1.42       87.98
         82 |        172        1.72       89.70
         83 |        233        2.33       92.03
         84 |        400        4.00       96.03
         85 |        250        2.50       98.53
         86 |          4        0.04       98.57
         99 |        143        1.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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