Frequencies for first 10,000 rows of llbmon variable in natl1985 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        528        5.28        5.28
          2 |        445        4.45        9.73
          3 |        449        4.49       14.22
          4 |        389        3.89       18.11
          5 |        396        3.96       22.07
          6 |        404        4.04       26.11
          7 |        470        4.70       30.81
          8 |        444        4.44       35.25
          9 |        493        4.93       40.18
         10 |        481        4.81       44.99
         11 |        429        4.29       49.28
         12 |        480        4.80       54.08
         77 |      4,464       44.64       98.72
         99 |        128        1.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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