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

Constructio |
n/Maintenan |
    ce Zone |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,848       98.48       98.48
          1 |         94        0.94       99.42
          2 |         17        0.17       99.59
          3 |          3        0.03       99.62
          4 |         38        0.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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