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

CONSTR/MAIN |
     T ZONE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,699       96.99       96.99
          1 |        198        1.98       98.97
          2 |         57        0.57       99.54
          3 |          5        0.05       99.59
          4 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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