Frequencies for pmodel variable in parkwork dataset :

    vehicle |
      model |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          9        0.79        0.79
          2 |         27        2.38        3.18
          3 |         10        0.88        4.06
          4 |          3        0.26        4.32
          5 |          1        0.09        4.41
          6 |          3        0.26        4.68
          7 |          6        0.53        5.21
          8 |          1        0.09        5.30
          9 |          3        0.26        5.56
         12 |          1        0.09        5.65
         13 |          1        0.09        5.74
         14 |          1        0.09        5.83
         16 |         13        1.15        6.97
         17 |          5        0.44        7.41
         18 |          7        0.62        8.03
         19 |          1        0.09        8.12
         20 |          6        0.53        8.65
         21 |          6        0.53        9.18
         22 |         11        0.97       10.15
         23 |         13        1.15       11.30
         24 |          6        0.53       11.83
         25 |          2        0.18       12.00
         26 |          1        0.09       12.09
         27 |          5        0.44       12.53
         28 |          2        0.18       12.71
         29 |          2        0.18       12.89
         31 |         30        2.65       15.53
         32 |         48        4.24       19.77
         33 |          9        0.79       20.56
         34 |         17        1.50       22.07
         35 |         20        1.77       23.83
         36 |          6        0.53       24.36
         37 |         26        2.29       26.65
         38 |          4        0.35       27.01
         39 |          9        0.79       27.80
         40 |         29        2.56       30.36
         41 |          2        0.18       30.54
         42 |          5        0.44       30.98
         43 |         21        1.85       32.83
         44 |          1        0.09       32.92
         46 |         10        0.88       33.80
         47 |         26        2.29       36.10
         48 |          2        0.18       36.28
         49 |          3        0.26       36.54
         50 |          4        0.35       36.89
         51 |         16        1.41       38.31
         52 |          5        0.44       38.75
         53 |          1        0.09       38.83
         55 |          2        0.18       39.01
        398 |          4        0.35       39.36
        399 |          4        0.35       39.72
        401 |         58        5.12       44.84
        402 |         33        2.91       47.75
        403 |         15        1.32       49.07
        404 |         23        2.03       51.10
        405 |          5        0.44       51.54
        406 |          1        0.09       51.63
        407 |          3        0.26       51.90
        421 |         28        2.47       54.37
        422 |         15        1.32       55.69
        423 |          2        0.18       55.87
        431 |          4        0.35       56.22
        441 |         16        1.41       57.63
        442 |         29        2.56       60.19
        443 |          5        0.44       60.64
        444 |          5        0.44       61.08
        461 |         11        0.97       62.05
        466 |          1        0.09       62.14
        470 |          3        0.26       62.40
        471 |         19        1.68       64.08
        472 |         16        1.41       65.49
        473 |          4        0.35       65.84
        481 |        107        9.44       75.29
        482 |         39        3.44       78.73
        499 |          2        0.18       78.91
        701 |          1        0.09       78.99
        705 |          2        0.18       79.17
        706 |         11        0.97       80.14
        734 |          1        0.09       80.23
        739 |          2        0.18       80.41
        804 |          3        0.26       80.67
        806 |          1        0.09       80.76
        808 |          1        0.09       80.85
        809 |          1        0.09       80.94
        850 |          2        0.18       81.11
        870 |          3        0.26       81.38
        880 |          5        0.44       81.82
        881 |        125       11.03       92.85
        882 |          3        0.26       93.12
        883 |          2        0.18       93.29
        884 |         37        3.27       96.56
        890 |          4        0.35       96.91
        898 |          6        0.53       97.44
        981 |          2        0.18       97.62
        988 |          1        0.09       97.71
        998 |         10        0.88       98.59
        999 |         16        1.41      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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