Frequencies for first 10,000 rows of llbmon variable in natl1982 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        508        5.08        5.08
          2 |        470        4.70        9.78
          3 |        450        4.50       14.28
          4 |        384        3.84       18.12
          5 |        412        4.12       22.24
          6 |        431        4.31       26.55
          7 |        540        5.40       31.95
          8 |        481        4.81       36.76
          9 |        456        4.56       41.32
         10 |        496        4.96       46.28
         11 |        445        4.45       50.73
         12 |        533        5.33       56.06
         77 |      4,321       43.21       99.27
         99 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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