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

       MCID |
    Issuing |
  Authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,182       91.82       91.82
          1 |          3        0.03       91.85
          6 |        108        1.08       92.93
          8 |          1        0.01       92.94
         10 |          4        0.04       92.98
         12 |         58        0.58       93.56
         13 |          6        0.06       93.62
         15 |          1        0.01       93.63
         17 |          3        0.03       93.66
         18 |          2        0.02       93.68
         19 |          1        0.01       93.69
         21 |          1        0.01       93.70
         24 |          1        0.01       93.71
         27 |          1        0.01       93.72
         37 |          2        0.02       93.74
         39 |          1        0.01       93.75
         42 |          2        0.02       93.77
         45 |          3        0.03       93.80
         47 |          1        0.01       93.81
         48 |          2        0.02       93.83
         54 |          1        0.01       93.84
         55 |          1        0.01       93.85
         56 |          2        0.02       93.87
         57 |        410        4.10       97.97
         58 |          2        0.02       97.99
         77 |         58        0.58       98.57
         88 |        105        1.05       99.62
         99 |         38        0.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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