Frequencies for first 10,000 rows of nlbnd variable in natl1986 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,778       97.78       97.78
          1 |        187        1.87       99.65
          2 |         17        0.17       99.82
          3 |          3        0.03       99.85
          4 |          1        0.01       99.86
         99 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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