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

 Born alive |
      - now |
     living |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,371       43.71       43.71
          1 |      3,232       32.32       76.03
          2 |      1,424       14.24       90.27
          3 |        533        5.33       95.60
          4 |        225        2.25       97.85
          5 |         95        0.95       98.80
          6 |         50        0.50       99.30
          7 |         23        0.23       99.53
          8 |         14        0.14       99.67
          9 |         12        0.12       99.79
         10 |          6        0.06       99.85
         11 |          5        0.05       99.90
         12 |          2        0.02       99.92
         13 |          1        0.01       99.93
         15 |          1        0.01       99.94
         17 |          1        0.01       99.95
         99 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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