Frequencies for first 10,000 rows of term9 variable in natl1987 dataset :

   Interval |
      Since |
Termination |
    of Last |
  Pregnancy |
   Recode 9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,838       38.38       38.38
          1 |        105        1.05       39.43
          2 |        206        2.06       41.49
          3 |        883        8.83       50.32
          4 |        785        7.85       58.17
          5 |      1,134       11.34       69.51
          6 |        773        7.73       77.24
          7 |        535        5.35       82.59
          8 |      1,259       12.59       95.18
          9 |        482        4.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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