Frequencies for first 10,000 rows of priorterm variable in natl2009 dataset :

Prior Other |
Termination |
      s U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,012       80.12       80.12
          1 |      1,408       14.08       94.20
          2 |        378        3.78       97.98
          3 |        122        1.22       99.20
          4 |         45        0.45       99.65
          5 |         13        0.13       99.78
          6 |          5        0.05       99.83
          7 |          2        0.02       99.85
          8 |          1        0.01       99.86
          9 |          2        0.02       99.88
         10 |          1        0.01       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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