Frequencies for first 10,000 rows of nlbnd variable in natl1983 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,784       97.84       97.84
          1 |        195        1.95       99.79
          2 |         15        0.15       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 , 3 Jan 2016