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

    SEATING |
   POSITION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        682        6.82        6.82
         11 |      5,230       52.30       59.12
         12 |         96        0.96       60.08
         13 |      1,854       18.54       78.62
         18 |         13        0.13       78.75
         19 |         12        0.12       78.87
         21 |        527        5.27       84.14
         22 |        212        2.12       86.26
         23 |        570        5.70       91.96
         28 |         21        0.21       92.17
         29 |         36        0.36       92.53
         31 |         43        0.43       92.96
         32 |         31        0.31       93.27
         33 |         31        0.31       93.58
         38 |          8        0.08       93.66
         39 |         10        0.10       93.76
         41 |          3        0.03       93.79
         42 |          1        0.01       93.80
         43 |          5        0.05       93.85
         48 |          4        0.04       93.89
         49 |          1        0.01       93.90
         50 |         20        0.20       94.10
         51 |        233        2.33       96.43
         52 |         23        0.23       96.66
         53 |         44        0.44       97.10
         54 |          1        0.01       97.11
         55 |         19        0.19       97.30
         99 |        270        2.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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