Frequencies for first 10,000 rows of nlbnd variable in natlterr1998 dataset :

  Number of |
Live Births |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,894       98.94       98.94
          1 |         95        0.95       99.89
          2 |          7        0.07       99.96
          3 |          2        0.02       99.98
          7 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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