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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,065       30.65       30.65
         47 |          1        0.01       30.66
         49 |          1        0.01       30.67
         51 |          2        0.02       30.69
         52 |          1        0.01       30.70
         53 |          4        0.04       30.74
         54 |          2        0.02       30.76
         55 |          2        0.02       30.78
         56 |          3        0.03       30.81
         57 |          4        0.04       30.85
         58 |          5        0.05       30.90
         59 |          5        0.05       30.95
         60 |          5        0.05       31.00
         61 |         12        0.12       31.12
         62 |          7        0.07       31.19
         63 |          6        0.06       31.25
         64 |         13        0.13       31.38
         65 |         19        0.19       31.57
         66 |         18        0.18       31.75
         67 |         36        0.36       32.11
         68 |         47        0.47       32.58
         69 |         75        0.75       33.33
         70 |        231        2.31       35.64
         71 |        396        3.96       39.60
         72 |        610        6.10       45.70
         73 |        992        9.92       55.62
         74 |      2,131       21.31       76.93
         75 |      1,578       15.78       92.71
         99 |        729        7.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016