Frequencies for first 10,000 rows of last_yr variable in vehicle dataset :

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,811       48.11       48.11
         88 |        280        2.80       50.91
         89 |        938        9.38       60.29
         90 |      1,926       19.26       79.55
         91 |      1,455       14.55       94.10
         99 |        590        5.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016