Frequencies for first 10,000 rows of llbmon variable in natl1988 dataset :

   Month of |
  Last Live |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        547        5.47        5.47
          2 |        489        4.89       10.36
          3 |        471        4.71       15.07
          4 |        385        3.85       18.92
          5 |        402        4.02       22.94
          6 |        367        3.67       26.61
          7 |        490        4.90       31.51
          8 |        488        4.88       36.39
          9 |        437        4.37       40.76
         10 |        452        4.52       45.28
         11 |        479        4.79       50.07
         12 |        476        4.76       54.83
         77 |      4,397       43.97       98.80
         99 |        120        1.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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