Frequencies for first 10,000 rows of nlbnl variable in natl1976 dataset :

 Born alive |
      - now |
     living |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,515       45.15       45.15
          1 |      3,049       30.49       75.64
          2 |      1,339       13.39       89.03
          3 |        553        5.53       94.56
          4 |        221        2.21       96.77
          5 |        126        1.26       98.03
          6 |         75        0.75       98.78
          7 |         47        0.47       99.25
          8 |         24        0.24       99.49
          9 |         19        0.19       99.68
         10 |         11        0.11       99.79
         11 |          6        0.06       99.85
         12 |          7        0.07       99.92
         13 |          2        0.02       99.94
         17 |          1        0.01       99.95
         77 |          2        0.02       99.97
         99 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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