Frequencies for first 10,000 rows of nlbnl variable in natlterr1997 dataset :

  Number of |
Live Births |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,263       42.63       42.63
          1 |      3,232       32.32       74.95
          2 |      1,575       15.75       90.70
          3 |        531        5.31       96.01
          4 |        218        2.18       98.19
          5 |         90        0.90       99.09
          6 |         46        0.46       99.55
          7 |         20        0.20       99.75
          8 |         13        0.13       99.88
          9 |          7        0.07       99.95
         10 |          3        0.03       99.98
         11 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015