Frequencies for first 10,000 rows of nlbnd variable in natl1976 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,586       95.86       95.86
          1 |        322        3.22       99.08
          2 |         51        0.51       99.59
          3 |          8        0.08       99.67
          4 |          3        0.03       99.70
          5 |          3        0.03       99.73
         77 |         14        0.14       99.87
         99 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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