Frequencies for first 10,000 rows of nlbnd variable in natl1969 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,290       92.90       92.90
          1 |        440        4.40       97.30
          2 |         81        0.81       98.11
          3 |         19        0.19       98.30
          4 |          5        0.05       98.35
          5 |          2        0.02       98.37
          7 |          1        0.01       98.38
         10 |          3        0.03       98.41
         20 |          1        0.01       98.42
         33 |          1        0.01       98.43
         55 |         14        0.14       98.57
         66 |          3        0.03       98.60
         77 |        101        1.01       99.61
         99 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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