Frequencies for first 10,000 rows of nlbnd variable in natl1970 dataset :

 Born alive |
 - now dead |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,373       93.73       93.73
          1 |        433        4.33       98.06
          2 |         67        0.67       98.73
          3 |         21        0.21       98.94
          4 |          4        0.04       98.98
          7 |          2        0.02       99.00
         10 |          1        0.01       99.01
         55 |         10        0.10       99.11
         66 |          1        0.01       99.12
         77 |         85        0.85       99.97
         99 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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