Frequencies for first 10,000 rows of nlbnd variable in natlterr2000 dataset :

  Number of |
Live Births |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,871       98.71       98.71
          1 |        115        1.15       99.86
          2 |         10        0.10       99.96
          3 |          2        0.02       99.98
          5 |          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