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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,364       53.64       53.64
          1 |        349        3.49       57.13
          2 |        296        2.96       60.09
          3 |        327        3.27       63.36
          4 |        341        3.41       66.77
          5 |        344        3.44       70.21
          6 |        344        3.44       73.65
          7 |        355        3.55       77.20
          8 |        350        3.50       80.70
          9 |        332        3.32       84.02
         10 |        353        3.53       87.55
         11 |        320        3.20       90.75
         12 |        290        2.90       93.65
         99 |        572        5.72       99.37
          . |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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