Frequencies for first 10,000 rows of nlbnd variable in natl2000 dataset :

  Number of |
Live Births |
   Now Dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,841       98.41       98.41
          1 |        139        1.39       99.80
          2 |         14        0.14       99.94
          3 |          4        0.04       99.98
          4 |          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