Frequencies for preg_stat variable in parkwork dataset :

    vehicle |
registratio |
    n state |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         24        2.12        2.12
          1 |         14        1.24        3.35
          4 |         25        2.21        5.56
          5 |         15        1.32        6.88
          6 |        173       15.27       22.15
          8 |         16        1.41       23.57
          9 |         11        0.97       24.54
         10 |          2        0.18       24.71
         12 |         73        6.44       31.16
         13 |         21        1.85       33.01
         15 |          8        0.71       33.72
         16 |          1        0.09       33.80
         17 |         56        4.94       38.75
         18 |         25        2.21       40.95
         19 |         14        1.24       42.19
         20 |          6        0.53       42.72
         21 |         18        1.59       44.31
         22 |         15        1.32       45.63
         23 |          4        0.35       45.98
         24 |         26        2.29       48.28
         25 |         13        1.15       49.43
         26 |         43        3.80       53.22
         27 |          7        0.62       53.84
         28 |          4        0.35       54.19
         29 |         17        1.50       55.69
         30 |          2        0.18       55.87
         31 |          6        0.53       56.40
         32 |         11        0.97       57.37
         33 |          2        0.18       57.55
         34 |         32        2.82       60.37
         36 |         51        4.50       64.87
         37 |         24        2.12       66.99
         38 |          1        0.09       67.08
         39 |         45        3.97       71.05
         40 |         12        1.06       72.11
         41 |         11        0.97       73.08
         42 |         44        3.88       76.96
         44 |          1        0.09       77.05
         45 |         21        1.85       78.91
         46 |          1        0.09       78.99
         47 |         19        1.68       80.67
         48 |         88        7.77       88.44
         49 |          8        0.71       89.14
         51 |         26        2.29       91.44
         53 |         20        1.77       93.20
         54 |          7        0.62       93.82
         55 |          7        0.62       94.44
         56 |          3        0.26       94.70
         91 |          1        0.09       94.79
         92 |         27        2.38       97.18
         93 |          9        0.79       97.97
         95 |          1        0.09       98.06
         96 |          2        0.18       98.23
         98 |          1        0.09       98.32
         99 |         19        1.68      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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