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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,331       53.31       53.31
          1 |        336        3.36       56.67
          2 |        306        3.06       59.73
          3 |        323        3.23       62.96
          4 |        351        3.51       66.47
          5 |        320        3.20       69.67
          6 |        349        3.49       73.16
          7 |        337        3.37       76.53
          8 |        364        3.64       80.17
          9 |        330        3.30       83.47
         10 |        344        3.44       86.91
         11 |        325        3.25       90.16
         12 |        325        3.25       93.41
         99 |        599        5.99       99.40
          . |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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