Frequencies for first 10,000 rows of nlbnd variable in natl1977 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,646       96.46       96.46
          1 |        289        2.89       99.35
          2 |         21        0.21       99.56
          3 |          9        0.09       99.65
          4 |          1        0.01       99.66
         77 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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