Frequencies for seat_pos variable in person dataset :

    Seating |
   Position |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        256       19.36       19.36
          1 |        575       43.49       62.86
          2 |          6        0.45       63.31
          3 |        119        9.00       72.31
          4 |          5        0.38       72.69
          5 |          1        0.08       72.77
          6 |          2        0.15       72.92
         13 |        123        9.30       82.22
         15 |          5        0.38       82.60
         99 |        230       17.40      100.00
------------+-----------------------------------
      Total |      1,322      100.00

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