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

       MCID |
    ISSUING |
  AUTHORITY |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,276       92.76       92.76
          1 |          1        0.01       92.77
          5 |          1        0.01       92.78
          6 |         99        0.99       93.77
         12 |         86        0.86       94.63
         13 |          3        0.03       94.66
         17 |          2        0.02       94.68
         23 |          1        0.01       94.69
         24 |          1        0.01       94.70
         36 |          1        0.01       94.71
         37 |          1        0.01       94.72
         42 |          1        0.01       94.73
         47 |          1        0.01       94.74
         48 |          1        0.01       94.75
         54 |          1        0.01       94.76
         57 |        419        4.19       98.95
         58 |          1        0.01       98.96
         88 |         31        0.31       99.27
         99 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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