Frequencies for pday variable in parkwork dataset :

 crash date |
      (day) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         44        4.03        4.03
          2 |         27        2.47        6.51
          3 |         25        2.29        8.80
          4 |         33        3.02       11.82
          5 |         26        2.38       14.21
          6 |         33        3.02       17.23
          7 |         32        2.93       20.16
          8 |         27        2.47       22.64
          9 |         29        2.66       25.30
         10 |         30        2.75       28.05
         11 |         29        2.66       30.71
         12 |         48        4.40       35.11
         13 |         40        3.67       38.77
         14 |         41        3.76       42.53
         15 |         21        1.92       44.45
         16 |         45        4.12       48.58
         17 |         46        4.22       52.80
         18 |         28        2.57       55.36
         19 |         41        3.76       59.12
         20 |         30        2.75       61.87
         21 |         29        2.66       64.53
         22 |         48        4.40       68.93
         23 |         32        2.93       71.86
         24 |         50        4.58       76.44
         25 |         44        4.03       80.48
         26 |         29        2.66       83.13
         27 |         36        3.30       86.43
         28 |         34        3.12       89.55
         29 |         41        3.76       93.31
         30 |         57        5.22       98.53
         31 |         16        1.47      100.00
------------+-----------------------------------
      Total |      1,091      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016