Frequencies for first 10,000 rows of term9 variable in natl1986 dataset :

   Interval |
      Since |
Termination |
    of Last |
  Pregnancy |
   Recode 9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,717       37.17       37.17
          1 |         82        0.82       37.99
          2 |        203        2.03       40.02
          3 |        883        8.83       48.85
          4 |        741        7.41       56.26
          5 |      1,176       11.76       68.02
          6 |        781        7.81       75.83
          7 |        543        5.43       81.26
          8 |      1,284       12.84       94.10
          9 |        590        5.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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