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

    Date of |
      First |
     crash, |
 suspension |
         or |
 conviction |
    (Month) |      Freq.     Percent        Cum.
------------+-----------------------------------
         -1 |         15        0.15        0.15
          0 |      5,586       55.86       56.01
          1 |        306        3.06       59.07
          2 |        321        3.21       62.28
          3 |        348        3.48       65.76
          4 |        346        3.46       69.22
          5 |        307        3.07       72.29
          6 |        366        3.66       75.95
          7 |        324        3.24       79.19
          8 |        344        3.44       82.63
          9 |        331        3.31       85.94
         10 |        366        3.66       89.60
         11 |        300        3.00       92.60
         12 |        306        3.06       95.66
         99 |        387        3.87       99.53
          . |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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