Frequencies for seq1 variable in vehicle dataset :

    EVENT 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.21        0.21
          5 |          9        1.91        2.12
          7 |          4        0.85        2.97
          8 |        105       22.25       25.21
          9 |         15        3.18       28.39
         12 |        220       46.61       75.00
         14 |         12        2.54       77.54
         15 |          6        1.27       78.81
         21 |          1        0.21       79.03
         22 |          1        0.21       79.24
         25 |         19        4.03       83.26
         30 |         21        4.45       87.71
         33 |          1        0.21       87.92
         34 |          1        0.21       88.14
         35 |          6        1.27       89.41
         36 |          1        0.21       89.62
         38 |          7        1.48       91.10
         39 |         11        2.33       93.43
         42 |         19        4.03       97.46
         43 |         12        2.54      100.00
------------+-----------------------------------
      Total |        472      100.00

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