Frequencies for first 10,000 rows of lbo variable in natl2003 dataset :

 Live Birth |
  Order U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,499       34.99       34.99
          2 |      2,881       28.81       63.80
          3 |      1,587       15.87       79.67
          4 |        775        7.75       87.42
          5 |        335        3.35       90.77
          6 |        201        2.01       92.78
          7 |         96        0.96       93.74
          8 |         61        0.61       94.35
          9 |         37        0.37       94.72
         10 |         20        0.20       94.92
         11 |          8        0.08       95.00
         12 |          8        0.08       95.08
         13 |          5        0.05       95.13
         14 |          2        0.02       95.15
         16 |          1        0.01       95.16
         99 |        484        4.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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