Frequencies for first 10,000 rows of nlbnd variable in natl1973 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,438       94.38       94.38
          1 |        435        4.35       98.73
          2 |         58        0.58       99.31
          3 |          8        0.08       99.39
          4 |          6        0.06       99.45
          5 |          1        0.01       99.46
          7 |          1        0.01       99.47
          9 |          1        0.01       99.48
         55 |          3        0.03       99.51
         77 |          4        0.04       99.55
         99 |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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