Frequencies for first 10,000 rows of lbo variable in natl2005 dataset :

 Live Birth |
  Order U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,734       37.34       37.34
          2 |      2,936       29.36       66.70
          3 |      1,651       16.51       83.21
          4 |        829        8.29       91.50
          5 |        400        4.00       95.50
          6 |        205        2.05       97.55
          7 |         99        0.99       98.54
          8 |         47        0.47       99.01
          9 |         40        0.40       99.41
         10 |         15        0.15       99.56
         11 |          5        0.05       99.61
         12 |          5        0.05       99.66
         13 |          6        0.06       99.72
         15 |          1        0.01       99.73
         16 |          1        0.01       99.74
         99 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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