Frequencies for first 10,000 rows of llbmon variable in natl1986 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        571        5.71        5.71
          2 |        494        4.94       10.65
          3 |        455        4.55       15.20
          4 |        360        3.60       18.80
          5 |        407        4.07       22.87
          6 |        394        3.94       26.81
          7 |        496        4.96       31.77
          8 |        522        5.22       36.99
          9 |        474        4.74       41.73
         10 |        455        4.55       46.28
         11 |        456        4.56       50.84
         12 |        483        4.83       55.67
         77 |      4,352       43.52       99.19
         99 |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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