Frequencies for state variable in parkwork dataset :

      State |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         16        1.50        1.50
          2 |          2        0.19        1.69
          4 |          9        0.85        2.54
          5 |          6        0.56        3.10
          6 |        195       18.33       21.43
          8 |         12        1.13       22.56
          9 |         23        2.16       24.72
         10 |          2        0.19       24.91
         11 |          3        0.28       25.19
         12 |         70        6.58       31.77
         13 |         30        2.82       34.59
         15 |          6        0.56       35.15
         16 |          1        0.09       35.24
         17 |         31        2.91       38.16
         18 |         22        2.07       40.23
         19 |          5        0.47       40.70
         20 |          1        0.09       40.79
         21 |         17        1.60       42.39
         22 |         19        1.79       44.17
         23 |          3        0.28       44.45
         24 |         29        2.73       47.18
         25 |         14        1.32       48.50
         26 |         14        1.32       49.81
         27 |         10        0.94       50.75
         29 |         32        3.01       53.76
         30 |          1        0.09       53.85
         31 |          5        0.47       54.32
         32 |         10        0.94       55.26
         34 |         39        3.67       58.93
         35 |          4        0.38       59.30
         36 |         78        7.33       66.64
         37 |         46        4.32       70.96
         38 |          1        0.09       71.05
         39 |         25        2.35       73.40
         40 |         14        1.32       74.72
         41 |          7        0.66       75.38
         42 |         65        6.11       81.48
         44 |          1        0.09       81.58
         45 |         18        1.69       83.27
         46 |          3        0.28       83.55
         47 |         14        1.32       84.87
         48 |         69        6.48       91.35
         49 |          4        0.38       91.73
         50 |          1        0.09       91.82
         51 |         33        3.10       94.92
         53 |         27        2.54       97.46
         54 |          8        0.75       98.21
         55 |         15        1.41       99.62
         56 |          4        0.38      100.00
------------+-----------------------------------
      Total |      1,064      100.00

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