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

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        614        6.14        6.14
          2 |        482        4.82       10.96
          3 |        403        4.03       14.99
          4 |        448        4.48       19.47
          5 |        409        4.09       23.56
          6 |        407        4.07       27.63
          7 |        432        4.32       31.95
          8 |        535        5.35       37.30
          9 |        483        4.83       42.13
         10 |        479        4.79       46.92
         11 |        446        4.46       51.38
         12 |        508        5.08       56.46
         77 |      4,266       42.66       99.12
         99 |         88        0.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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