Frequencies for first 10,000 rows of nlbnd variable in natl1981 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,753       97.53       97.53
          1 |        217        2.17       99.70
          2 |         20        0.20       99.90
          3 |          2        0.02       99.92
          4 |          1        0.01       99.93
          5 |          1        0.01       99.94
          7 |          1        0.01       99.95
         99 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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