Frequencies for first 10,000 rows of nlbnd variable in natlterr1996 dataset :

  Number of |
Live Births |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,858       98.58       98.58
          1 |        127        1.27       99.85
          2 |         11        0.11       99.96
          3 |          2        0.02       99.98
          4 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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