Frequencies for first 10,000 rows of priorterm variable in natl2005 dataset :

Prior Other |
Termination |
      s U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,174       71.74       71.74
          1 |      1,752       17.52       89.26
          2 |        651        6.51       95.77
          3 |        260        2.60       98.37
          4 |         72        0.72       99.09
          5 |         24        0.24       99.33
          6 |         22        0.22       99.55
          7 |          6        0.06       99.61
          8 |          3        0.03       99.64
          9 |          3        0.03       99.67
         10 |          1        0.01       99.68
         15 |          1        0.01       99.69
         99 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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