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

       LAST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,967       49.67       49.67
          1 |        383        3.83       53.50
          2 |        340        3.40       56.90
          3 |        402        4.02       60.92
          4 |        403        4.03       64.95
          5 |        429        4.29       69.24
          6 |        397        3.97       73.21
          7 |        398        3.98       77.19
          8 |        355        3.55       80.74
          9 |        329        3.29       84.03
         10 |        415        4.15       88.18
         11 |        366        3.66       91.84
         12 |        324        3.24       95.08
         99 |        492        4.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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