Frequencies for state variable in parkwork dataset :

      state |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.92        0.92
          4 |         14        1.29        2.20
          5 |          7        0.64        2.85
          6 |        184       16.90       19.74
          8 |         12        1.10       20.84
          9 |         16        1.47       22.31
         10 |          2        0.18       22.50
         11 |          3        0.28       22.77
         12 |         67        6.15       28.93
         13 |         25        2.30       31.22
         15 |          1        0.09       31.31
         17 |         41        3.76       35.08
         18 |         31        2.85       37.92
         19 |          1        0.09       38.02
         20 |          9        0.83       38.84
         21 |         15        1.38       40.22
         22 |         20        1.84       42.06
         24 |         25        2.30       44.35
         25 |         14        1.29       45.64
         26 |         36        3.31       48.94
         27 |          5        0.46       49.40
         28 |          4        0.37       49.77
         29 |         33        3.03       52.80
         30 |          4        0.37       53.17
         31 |          1        0.09       53.26
         32 |          6        0.55       53.81
         33 |          3        0.28       54.09
         34 |         27        2.48       56.57
         35 |          5        0.46       57.02
         36 |         94        8.63       65.66
         37 |         43        3.95       69.61
         38 |          3        0.28       69.88
         39 |         44        4.04       73.92
         40 |         15        1.38       75.30
         41 |          7        0.64       75.94
         42 |         51        4.68       80.62
         45 |          8        0.73       81.36
         46 |          1        0.09       81.45
         47 |         28        2.57       84.02
         48 |        105        9.64       93.66
         49 |         14        1.29       94.95
         51 |         14        1.29       96.24
         53 |         18        1.65       97.89
         54 |         10        0.92       98.81
         55 |         10        0.92       99.72
         56 |          3        0.28      100.00
------------+-----------------------------------
      Total |      1,089      100.00

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