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

Constructio |
n/Maintenan |
    ce Zone |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,826       98.26       98.26
          1 |        135        1.35       99.61
          2 |         14        0.14       99.75
          3 |          1        0.01       99.76
          4 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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