Frequencies for first 10,000 rows of llbmon variable in natl1987 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        595        5.95        5.95
          2 |        471        4.71       10.66
          3 |        441        4.41       15.07
          4 |        392        3.92       18.99
          5 |        425        4.25       23.24
          6 |        390        3.90       27.14
          7 |        446        4.46       31.60
          8 |        489        4.89       36.49
          9 |        471        4.71       41.20
         10 |        469        4.69       45.89
         11 |        448        4.48       50.37
         12 |        462        4.62       54.99
         77 |      4,438       44.38       99.37
         99 |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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