Frequencies for pday variable in parkwork dataset :

 crash date |
      (day) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         39        3.58        3.58
          2 |         28        2.57        6.15
          3 |         38        3.49        9.64
          4 |         30        2.75       12.40
          5 |         40        3.67       16.07
          6 |         20        1.84       17.91
          7 |         29        2.66       20.57
          8 |         47        4.32       24.89
          9 |         35        3.21       28.10
         10 |         33        3.03       31.13
         11 |         18        1.65       32.78
         12 |         54        4.96       37.74
         13 |         43        3.95       41.69
         14 |         48        4.41       46.10
         15 |         34        3.12       49.22
         16 |         39        3.58       52.80
         17 |         42        3.86       56.66
         18 |         31        2.85       59.50
         19 |         29        2.66       62.17
         20 |         31        2.85       65.01
         21 |         33        3.03       68.04
         22 |         39        3.58       71.63
         23 |         27        2.48       74.10
         24 |         40        3.67       77.78
         25 |         30        2.75       80.53
         26 |         49        4.50       85.03
         27 |         36        3.31       88.34
         28 |         32        2.94       91.28
         29 |         36        3.31       94.58
         30 |         37        3.40       97.98
         31 |         22        2.02      100.00
------------+-----------------------------------
      Total |      1,089      100.00

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