Frequencies for first 10,000 rows of lfdyr variable in natl1979 dataset :

    Date of |
 Last Fetal |
    Death - |
       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         52 |          1        0.01        0.01
         53 |          1        0.01        0.02
         56 |          1        0.01        0.03
         58 |          1        0.01        0.04
         59 |          4        0.04        0.08
         60 |          7        0.07        0.15
         61 |          1        0.01        0.16
         62 |          5        0.05        0.21
         63 |         10        0.10        0.31
         64 |          7        0.07        0.38
         65 |          8        0.08        0.46
         66 |         13        0.13        0.59
         67 |         16        0.16        0.75
         68 |         20        0.20        0.95
         69 |         28        0.28        1.23
         70 |         29        0.29        1.52
         71 |         50        0.50        2.02
         72 |         78        0.78        2.80
         73 |         90        0.90        3.70
         74 |        113        1.13        4.83
         75 |        152        1.52        6.35
         76 |        217        2.17        8.52
         77 |      8,862       88.62       97.14
         78 |        194        1.94       99.08
         79 |          2        0.02       99.10
         99 |         90        0.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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