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

Constructio |
n/Maintenan |
    ce Zone |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,882       98.82       98.82
          1 |         60        0.60       99.42
          2 |         40        0.40       99.82
          3 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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