Frequencies for state variable in parkwork dataset :

      state |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         18        1.59        1.59
          4 |         36        3.18        4.77
          5 |         18        1.59        6.35
          6 |        179       15.80       22.15
          8 |         13        1.15       23.30
          9 |          8        0.71       24.01
         10 |          1        0.09       24.10
         11 |          2        0.18       24.27
         12 |         73        6.44       30.71
         13 |         23        2.03       32.74
         15 |          8        0.71       33.45
         16 |          1        0.09       33.54
         17 |         52        4.59       38.13
         18 |         14        1.24       39.36
         19 |         12        1.06       40.42
         20 |          7        0.62       41.04
         21 |         22        1.94       42.98
         22 |         19        1.68       44.66
         23 |          4        0.35       45.01
         24 |         26        2.29       47.31
         25 |         16        1.41       48.72
         26 |         37        3.27       51.99
         27 |          3        0.26       52.25
         28 |          5        0.44       52.69
         29 |         21        1.85       54.55
         30 |          2        0.18       54.72
         31 |          6        0.53       55.25
         32 |         13        1.15       56.40
         34 |         34        3.00       59.40
         36 |         63        5.56       64.96
         37 |         30        2.65       67.61
         38 |          2        0.18       67.78
         39 |         52        4.59       72.37
         40 |         14        1.24       73.61
         41 |         11        0.97       74.58
         42 |         57        5.03       79.61
         45 |         21        1.85       81.47
         46 |          1        0.09       81.55
         47 |         17        1.50       83.05
         48 |        108        9.53       92.59
         49 |          8        0.71       93.29
         50 |          2        0.18       93.47
         51 |         26        2.29       95.76
         53 |         23        2.03       97.79
         54 |          9        0.79       98.59
         55 |         10        0.88       99.47
         56 |          6        0.53      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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