Frequencies for first 10,000 rows of llbmon variable in natl1980 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        572        5.72        5.72
          2 |        485        4.85       10.57
          3 |        448        4.48       15.05
          4 |        437        4.37       19.42
          5 |        414        4.14       23.56
          6 |        384        3.84       27.40
          7 |        467        4.67       32.07
          8 |        481        4.81       36.88
          9 |        516        5.16       42.04
         10 |        485        4.85       46.89
         11 |        452        4.52       51.41
         12 |        462        4.62       56.03
         77 |      4,326       43.26       99.29
         99 |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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