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

        vin |
  restraint |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,340       83.40       83.40
          3 |          4        0.04       83.44
          4 |         66        0.66       84.10
          7 |         69        0.69       84.79
          A |        229        2.29       87.08
          B |         24        0.24       87.32
          E |        617        6.17       93.49
          F |          4        0.04       93.53
          K |         78        0.78       94.31
          L |          9        0.09       94.40
          M |         97        0.97       95.37
          R |          6        0.06       95.43
          S |         25        0.25       95.68
          U |        405        4.05       99.73
          W |         26        0.26       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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