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

    Seating |
   Position |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        870        8.70        8.70
         11 |      5,680       56.80       65.50
         12 |         46        0.46       65.96
         13 |      1,649       16.49       82.45
         19 |          1        0.01       82.46
         21 |        502        5.02       87.48
         22 |        192        1.92       89.40
         23 |        517        5.17       94.57
         28 |          8        0.08       94.65
         29 |         15        0.15       94.80
         31 |         37        0.37       95.17
         32 |         19        0.19       95.36
         33 |         26        0.26       95.62
         38 |          2        0.02       95.64
         39 |          9        0.09       95.73
         41 |          3        0.03       95.76
         42 |          1        0.01       95.77
         43 |          2        0.02       95.79
         50 |         18        0.18       95.97
         51 |        156        1.56       97.53
         52 |         19        0.19       97.72
         53 |         11        0.11       97.83
         55 |         13        0.13       97.96
         98 |          5        0.05       98.01
         99 |        199        1.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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