Frequencies for first 10,000 rows of term9 variable in natl1988 dataset :

   Interval |
      Since |
Termination |
    of Last |
  Pregnancy |
   Recode 9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,783       37.83       37.83
          1 |        110        1.10       38.93
          2 |        202        2.02       40.95
          3 |        868        8.68       49.63
          4 |        743        7.43       57.06
          5 |      1,118       11.18       68.24
          6 |        699        6.99       75.23
          7 |        509        5.09       80.32
          8 |      1,217       12.17       92.49
          9 |        751        7.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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