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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,317       53.17       53.17
          1 |        322        3.22       56.39
          2 |        324        3.24       59.63
          3 |        392        3.92       63.55
          4 |        342        3.42       66.97
          5 |        392        3.92       70.89
          6 |        338        3.38       74.27
          7 |        382        3.82       78.09
          8 |        348        3.48       81.57
          9 |        324        3.24       84.81
         10 |        348        3.48       88.29
         11 |        366        3.66       91.95
         12 |        353        3.53       95.48
         99 |        373        3.73       99.21
          . |         79        0.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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