Frequencies for first 10,000 rows of isllb10 variable in natl1992 dataset :

   Interval |
 since last |
 live birth |
  Recode 10 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,268       42.68       42.68
          1 |        121        1.21       43.89
          2 |         84        0.84       44.73
          3 |        710        7.10       51.83
          4 |        752        7.52       59.35
          5 |      1,236       12.36       71.71
          6 |        849        8.49       80.20
          7 |        513        5.13       85.33
          8 |        368        3.68       89.01
          9 |      1,081       10.81       99.82
         10 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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