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

       mcid |
    issuing |
  authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,235       92.35       92.35
          1 |          1        0.01       92.36
          2 |          1        0.01       92.37
          6 |         99        0.99       93.36
          8 |          1        0.01       93.37
         10 |          4        0.04       93.41
         12 |         60        0.60       94.01
         13 |          1        0.01       94.02
         17 |          4        0.04       94.06
         18 |          2        0.02       94.08
         20 |          1        0.01       94.09
         24 |          2        0.02       94.11
         26 |          1        0.01       94.12
         28 |          3        0.03       94.15
         31 |          1        0.01       94.16
         36 |          1        0.01       94.17
         40 |          2        0.02       94.19
         42 |          1        0.01       94.20
         47 |          3        0.03       94.23
         48 |          2        0.02       94.25
         52 |          2        0.02       94.27
         54 |          1        0.01       94.28
         57 |        440        4.40       98.68
         77 |         33        0.33       99.01
         88 |         66        0.66       99.67
         99 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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