Frequencies for first 10,000 rows of seat_pos variable in person dataset :

    seating |
   position |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        953        9.53        9.53
         11 |      5,909       59.09       68.62
         12 |         28        0.28       68.90
         13 |      1,596       15.96       84.86
         19 |          7        0.07       84.93
         21 |        442        4.42       89.35
         22 |        177        1.77       91.12
         23 |        490        4.90       96.02
         28 |          4        0.04       96.06
         29 |         20        0.20       96.26
         31 |         18        0.18       96.44
         32 |          8        0.08       96.52
         33 |         16        0.16       96.68
         38 |          1        0.01       96.69
         39 |          6        0.06       96.75
         41 |          2        0.02       96.77
         42 |          1        0.01       96.78
         43 |          1        0.01       96.79
         50 |         21        0.21       97.00
         51 |        120        1.20       98.20
         52 |         11        0.11       98.31
         53 |          1        0.01       98.32
         55 |          4        0.04       98.36
         98 |         29        0.29       98.65
         99 |        135        1.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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