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

    seating |
   position |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        875        8.75        8.75
         11 |      5,831       58.31       67.06
         12 |         37        0.37       67.43
         13 |      1,575       15.75       83.18
         18 |          3        0.03       83.21
         21 |        513        5.13       88.34
         22 |        208        2.08       90.42
         23 |        511        5.11       95.53
         28 |          9        0.09       95.62
         29 |         14        0.14       95.76
         31 |         18        0.18       95.94
         32 |         13        0.13       96.07
         33 |         14        0.14       96.21
         39 |         18        0.18       96.39
         50 |         10        0.10       96.49
         51 |        153        1.53       98.02
         52 |         19        0.19       98.21
         53 |          8        0.08       98.29
         55 |         13        0.13       98.42
         98 |         17        0.17       98.59
         99 |        141        1.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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