Frequencies for first 10,000 rows of sp_jur variable in accident dataset :

    special |
jurisdictio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,870       98.70       98.70
          1 |          5        0.05       98.75
          2 |          4        0.04       98.79
          3 |        103        1.03       99.82
          4 |          2        0.02       99.84
          8 |          2        0.02       99.86
          9 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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