Frequencies for first 10,000 rows of lfdyr variable in natl1978 dataset :

    Date of |
 Last Fetal |
    Death - |
       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         58 |          1        0.01        0.01
         59 |          2        0.02        0.03
         60 |          2        0.02        0.05
         61 |          6        0.06        0.11
         62 |          6        0.06        0.17
         63 |         10        0.10        0.27
         64 |         12        0.12        0.39
         65 |         14        0.14        0.53
         66 |         11        0.11        0.64
         67 |         22        0.22        0.86
         68 |         30        0.30        1.16
         69 |         36        0.36        1.52
         70 |         65        0.65        2.17
         71 |         58        0.58        2.75
         72 |         96        0.96        3.71
         73 |        106        1.06        4.77
         74 |        151        1.51        6.28
         75 |        178        1.78        8.06
         76 |        330        3.30       11.36
         77 |      8,748       87.48       98.84
         78 |          1        0.01       98.85
         99 |        115        1.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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