Frequencies for first 10,000 rows of lfdyr variable in natl1981 dataset :

    Date of |
 Last Fetal |
    Death - |
       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         56 |          1        0.01        0.01
         59 |          1        0.01        0.02
         60 |          1        0.01        0.03
         61 |          1        0.01        0.04
         62 |          2        0.02        0.06
         63 |          3        0.03        0.09
         64 |          2        0.02        0.11
         65 |         11        0.11        0.22
         66 |          5        0.05        0.27
         67 |         13        0.13        0.40
         68 |         10        0.10        0.50
         69 |         24        0.24        0.74
         70 |         25        0.25        0.99
         71 |         28        0.28        1.27
         72 |         55        0.55        1.82
         73 |         66        0.66        2.48
         74 |         63        0.63        3.11
         75 |        101        1.01        4.12
         76 |        147        1.47        5.59
         77 |      8,437       84.37       89.96
         78 |        229        2.29       92.25
         79 |        430        4.30       96.55
         80 |        216        2.16       98.71
         81 |          2        0.02       98.73
         99 |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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