Frequencies for first 10,000 rows of term9 variable in natl1983 dataset :

   Interval |
      Since |
Termination |
    of Last |
  Pregnancy |
   Recode 9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,757       37.57       37.57
          1 |        111        1.11       38.68
          2 |        197        1.97       40.65
          3 |        947        9.47       50.12
          4 |        759        7.59       57.71
          5 |      1,232       12.32       70.03
          6 |        870        8.70       78.73
          7 |        548        5.48       84.21
          8 |      1,191       11.91       96.12
          9 |        388        3.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016