Frequencies for pmonth variable in parkwork dataset :

 Crash Date |
    (Month) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         70        6.99        6.99
          2 |         82        8.18       15.17
          3 |         62        6.19       21.36
          4 |         84        8.38       29.74
          5 |         81        8.08       37.82
          6 |         89        8.88       46.71
          7 |        117       11.68       58.38
          8 |         90        8.98       67.37
          9 |         73        7.29       74.65
         10 |         85        8.48       83.13
         11 |         60        5.99       89.12
         12 |        109       10.88      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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