Frequencies for pday variable in parkwork dataset :

 Crash Date |
      (Day) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         30        2.99        2.99
          2 |         18        1.80        4.79
          3 |         30        2.99        7.78
          4 |         30        2.99       10.78
          5 |         43        4.29       15.07
          6 |         26        2.59       17.66
          7 |         21        2.10       19.76
          8 |         26        2.59       22.36
          9 |         30        2.99       25.35
         10 |         49        4.89       30.24
         11 |         24        2.40       32.63
         12 |         27        2.69       35.33
         13 |         33        3.29       38.62
         14 |         44        4.39       43.01
         15 |         29        2.89       45.91
         16 |         32        3.19       49.10
         17 |         60        5.99       55.09
         18 |         43        4.29       59.38
         19 |         26        2.59       61.98
         20 |         37        3.69       65.67
         21 |         27        2.69       68.36
         22 |         24        2.40       70.76
         23 |         30        2.99       73.75
         24 |         33        3.29       77.05
         25 |         32        3.19       80.24
         26 |         39        3.89       84.13
         27 |         26        2.59       86.73
         28 |         34        3.39       90.12
         29 |         30        2.99       93.11
         30 |         45        4.49       97.60
         31 |         24        2.40      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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