Frequencies for first 10,000 rows of lbo variable in natl2004 dataset :

 Live Birth |
  Order U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,301       33.01       33.01
          2 |      2,634       26.34       59.35
          3 |      1,475       14.75       74.10
          4 |        756        7.56       81.66
          5 |        347        3.47       85.13
          6 |        174        1.74       86.87
          7 |        108        1.08       87.95
          8 |         50        0.50       88.45
          9 |         36        0.36       88.81
         10 |         16        0.16       88.97
         11 |         11        0.11       89.08
         12 |         10        0.10       89.18
         13 |          3        0.03       89.21
         14 |          3        0.03       89.24
         16 |          1        0.01       89.25
         22 |          1        0.01       89.26
         99 |      1,074       10.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 21 Jan 2016