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

    Date of |
 Last Fetal |
    Death - |
      Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        118        1.18        1.18
          2 |        108        1.08        2.26
          3 |        116        1.16        3.42
          4 |         95        0.95        4.37
          5 |         72        0.72        5.09
          6 |         95        0.95        6.04
          7 |         93        0.93        6.97
          8 |         89        0.89        7.86
          9 |         68        0.68        8.54
         10 |         76        0.76        9.30
         11 |        102        1.02       10.32
         12 |         97        0.97       11.29
         77 |      8,273       82.73       94.02
         99 |        598        5.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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