Frequencies for first 10,000 rows of lfdyr variable in natl1977 dataset :

    Date of |
 Last Fetal |
    Death - |
       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         52 |          1        0.01        0.01
         55 |          2        0.02        0.03
         56 |          1        0.01        0.04
         57 |          2        0.02        0.06
         58 |          2        0.02        0.08
         59 |          4        0.04        0.12
         60 |          5        0.05        0.17
         61 |          3        0.03        0.20
         62 |          9        0.09        0.29
         63 |          4        0.04        0.33
         64 |         10        0.10        0.43
         65 |         15        0.15        0.58
         66 |         14        0.14        0.72
         67 |         21        0.21        0.93
         68 |         40        0.40        1.33
         69 |         55        0.55        1.88
         70 |         64        0.64        2.52
         71 |         76        0.76        3.28
         72 |        117        1.17        4.45
         73 |        134        1.34        5.79
         74 |        170        1.70        7.49
         75 |        337        3.37       10.86
         76 |        165        1.65       12.51
         77 |      8,665       86.65       99.16
         99 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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