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

    Date of |
 Last Fetal |
    Death - |
      Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         94        0.94        0.94
          2 |        101        1.01        1.95
          3 |        101        1.01        2.96
          4 |         77        0.77        3.73
          5 |         68        0.68        4.41
          6 |         75        0.75        5.16
          7 |         67        0.67        5.83
          8 |         56        0.56        6.39
          9 |         67        0.67        7.06
         10 |         84        0.84        7.90
         11 |         76        0.76        8.66
         12 |         86        0.86        9.52
         77 |      8,593       85.93       95.45
         99 |        455        4.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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