Frequencies for first 10,000 rows of nlbnl variable in natl1975 dataset :

 Born alive |
      - now |
     living |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,462       44.62       44.62
          1 |      3,171       31.71       76.33
          2 |      1,229       12.29       88.62
          3 |        516        5.16       93.78
          4 |        248        2.48       96.26
          5 |        133        1.33       97.59
          6 |         86        0.86       98.45
          7 |         57        0.57       99.02
          8 |         23        0.23       99.25
          9 |         19        0.19       99.44
         10 |         18        0.18       99.62
         11 |          6        0.06       99.68
         12 |          6        0.06       99.74
         13 |          4        0.04       99.78
         15 |          1        0.01       99.79
         77 |         14        0.14       99.93
         99 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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