Frequencies for last_mo variable in vehicle dataset :

       LAST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        317       67.16       67.16
          1 |         12        2.54       69.70
          2 |         10        2.12       71.82
          3 |         11        2.33       74.15
          4 |         11        2.33       76.48
          5 |         15        3.18       79.66
          6 |          4        0.85       80.51
          7 |          7        1.48       81.99
          8 |          7        1.48       83.47
          9 |         10        2.12       85.59
         10 |          5        1.06       86.65
         11 |         10        2.12       88.77
         12 |         14        2.97       91.74
         99 |         39        8.26      100.00
------------+-----------------------------------
      Total |        472      100.00

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