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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,811       48.11       48.11
          1 |        418        4.18       52.29
          2 |        345        3.45       55.74
          3 |        385        3.85       59.59
          4 |        374        3.74       63.33
          5 |        407        4.07       67.40
          6 |        387        3.87       71.27
          7 |        385        3.85       75.12
          8 |        398        3.98       79.10
          9 |        358        3.58       82.68
         10 |        386        3.86       86.54
         11 |        387        3.87       90.41
         12 |        369        3.69       94.10
         99 |        590        5.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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