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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,467       54.67       54.67
          1 |        335        3.35       58.02
          2 |        301        3.01       61.03
          3 |        345        3.45       64.48
          4 |        321        3.21       67.69
          5 |        310        3.10       70.79
          6 |        374        3.74       74.53
          7 |        356        3.56       78.09
          8 |        321        3.21       81.30
          9 |        334        3.34       84.64
         10 |        353        3.53       88.17
         11 |        312        3.12       91.29
         12 |        321        3.21       94.50
         99 |        469        4.69       99.19
          . |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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