Frequencies for first 10,000 rows of nlbnd variable in natl1999 dataset :

  Number of |
Live Births |
   Now Dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,870       98.70       98.70
          1 |        120        1.20       99.90
          2 |          8        0.08       99.98
          3 |          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