Frequencies for first 10,000 rows of nlbnd variable in natl1987 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,815       98.15       98.15
          1 |        164        1.64       99.79
          2 |         12        0.12       99.91
          3 |          1        0.01       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016