Frequencies for first 10,000 rows of lbo variable in natlterr2003 dataset :

 Live Birth |
  Order U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,453       44.53       44.53
          2 |      3,325       33.25       77.78
          3 |      1,556       15.56       93.34
          4 |        420        4.20       97.54
          5 |        144        1.44       98.98
          6 |         54        0.54       99.52
          7 |         18        0.18       99.70
          8 |         19        0.19       99.89
          9 |          5        0.05       99.94
         10 |          2        0.02       99.96
         11 |          1        0.01       99.97
         12 |          2        0.02       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015