Frequencies for state variable in parkwork dataset :

      State |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         16        1.60        1.60
          2 |          2        0.20        1.80
          4 |         16        1.60        3.39
          5 |          4        0.40        3.79
          6 |        129       12.87       16.67
          8 |          5        0.50       17.17
          9 |         11        1.10       18.26
         10 |          3        0.30       18.56
         11 |          5        0.50       19.06
         12 |         54        5.39       24.45
         13 |         30        2.99       27.45
         15 |          5        0.50       27.94
         16 |          3        0.30       28.24
         17 |         34        3.39       31.64
         18 |         19        1.90       33.53
         19 |         10        1.00       34.53
         20 |          8        0.80       35.33
         21 |         12        1.20       36.53
         22 |         14        1.40       37.92
         23 |          4        0.40       38.32
         24 |         21        2.10       40.42
         25 |         16        1.60       42.02
         26 |         29        2.89       44.91
         27 |          6        0.60       45.51
         29 |         17        1.70       47.21
         31 |          3        0.30       47.50
         32 |          7        0.70       48.20
         33 |          1        0.10       48.30
         34 |         53        5.29       53.59
         35 |         13        1.30       54.89
         36 |         77        7.68       62.57
         37 |         33        3.29       65.87
         38 |          1        0.10       65.97
         39 |         28        2.79       68.76
         40 |         18        1.80       70.56
         41 |          9        0.90       71.46
         42 |         73        7.29       78.74
         44 |          1        0.10       78.84
         45 |         15        1.50       80.34
         46 |          4        0.40       80.74
         47 |         18        1.80       82.53
         48 |         90        8.98       91.52
         49 |         11        1.10       92.61
         51 |         15        1.50       94.11
         53 |         19        1.90       96.01
         54 |         10        1.00       97.01
         55 |         27        2.69       99.70
         56 |          3        0.30      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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