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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,321       53.21       53.21
          1 |        385        3.85       57.06
          2 |        355        3.55       60.61
          3 |        375        3.75       64.36
          4 |        336        3.36       67.72
          5 |        339        3.39       71.11
          6 |        354        3.54       74.65
          7 |        372        3.72       78.37
          8 |        359        3.59       81.96
          9 |        361        3.61       85.57
         10 |        327        3.27       88.84
         11 |        335        3.35       92.19
         12 |        316        3.16       95.35
         99 |        393        3.93       99.28
          . |         72        0.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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