Frequencies for first 10,000 rows of mcarr_i1 variable in vehicle dataset :

       MCID |
    Issuing |
  Authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,203       92.03       92.03
          1 |          4        0.04       92.07
          6 |        107        1.07       93.14
          8 |          1        0.01       93.15
          9 |          2        0.02       93.17
         10 |          1        0.01       93.18
         12 |         16        0.16       93.34
         15 |          2        0.02       93.36
         18 |          1        0.01       93.37
         24 |          1        0.01       93.38
         25 |          1        0.01       93.39
         37 |          1        0.01       93.40
         39 |          1        0.01       93.41
         57 |        389        3.89       97.30
         58 |          2        0.02       97.32
         77 |        114        1.14       98.46
         88 |         57        0.57       99.03
         99 |         97        0.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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