Frequencies for first 10,000 rows of lbo variable in natlterr2005 dataset :

 Live Birth |
  Order U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,631       36.31       36.31
          2 |      2,700       27.00       63.31
          3 |      1,632       16.32       79.63
          4 |        867        8.67       88.30
          5 |        487        4.87       93.17
          6 |        294        2.94       96.11
          7 |        157        1.57       97.68
          8 |         80        0.80       98.48
          9 |         50        0.50       98.98
         10 |         21        0.21       99.19
         11 |          5        0.05       99.24
         12 |          6        0.06       99.30
         13 |          5        0.05       99.35
         14 |         12        0.12       99.47
         15 |          2        0.02       99.49
         16 |          1        0.01       99.50
         17 |          2        0.02       99.52
         21 |          1        0.01       99.53
         99 |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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