Frequencies for first 10,000 rows of nlbnd variable in natl1988 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,812       98.12       98.12
          1 |        164        1.64       99.76
          2 |         11        0.11       99.87
          3 |          1        0.01       99.88
          4 |          1        0.01       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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