yearquar year quarter  headlight accidents persons trafinx
87.00     87      1      no        57      77     100 
87.25     87      2      no        88     115     119 
87.50     87      3      no        88     126     127 
87.75     87      4      no        66      77     117 
88.00     88      1      no        67      95     111 
88.25     88      2      no        96     143     126 
88.50     88      3      no        93     140     130 
88.75     88      4      no        74      99     120 
89.00     89      1      no        54      75     117 
89.25     89      2      no        83     117     130 
89.50     89      3      no        91     135     134 
89.75     89      4      no        87     121     123 
90.00     90      1      no        59      75     120 
90.25     90      2      no       107     147     132 
90.50     90      3      no        83     107     139 
90.75     90      4      yes       35      45     126 
91.00     91      1      yes       35      48     119 
91.25     91      2      yes       64      81     137 
91.50     91      3      yes       78     113     145 
91.75     91      4      yes       50      75     130