Frequencies for pday variable in parkwork dataset :

 Crash Date |
      (Day) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         42        3.95        3.95
          2 |         32        3.01        6.95
          3 |         29        2.73        9.68
          4 |         42        3.95       13.63
          5 |         56        5.26       18.89
          6 |         35        3.29       22.18
          7 |         29        2.73       24.91
          8 |         29        2.73       27.63
          9 |         30        2.82       30.45
         10 |         29        2.73       33.18
         11 |         42        3.95       37.12
         12 |         24        2.26       39.38
         13 |         41        3.85       43.23
         14 |         40        3.76       46.99
         15 |         25        2.35       49.34
         16 |         32        3.01       52.35
         17 |         36        3.38       55.73
         18 |         34        3.20       58.93
         19 |         34        3.20       62.12
         20 |         21        1.97       64.10
         21 |         39        3.67       67.76
         22 |         37        3.48       71.24
         23 |         40        3.76       75.00
         24 |         38        3.57       78.57
         25 |         26        2.44       81.02
         26 |         25        2.35       83.36
         27 |         43        4.04       87.41
         28 |         30        2.82       90.23
         29 |         42        3.95       94.17
         30 |         37        3.48       97.65
         31 |         25        2.35      100.00
------------+-----------------------------------
      Total |      1,064      100.00

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