obs       tax       dlic      fuel
    1        9        52.5      541   
    2        9        57.2      524   
    3        9        58        561   
    4       7.5       52.9      414   
    5        8        54.4      410   
    6       10        57.1      457   
    7        8        45.1      344   
    8        8        55.3      467   
    9        8        52.9      464   
    10       7        55.2      498   
    11       8        53        580   
    12      7.5       52.5      471   
    13       7        57.4      525   
    14       7        54.5      508   
    15       7        60.8      566   
    16       7        58.6      635   
    17       7        57.2      603   
    18       7        54        714   
    19       7        72.4      865   
    20      8.5       67.7      640   
    21       7        66.3      649   
    22       8        60.2      540   
    23       9        51.1      464   
    24       9        51.7      547   
    25      8.5       55.1      460   
    26       9        54.4      566   
    27       8        54.8      577   
    28      7.5       57.9      631   
    29       8        56.3      574   
    30       9        49.3      534   
    31       7        51.8      571   
    32       7        51.3      554   
    33       8        57.8      577   
    34      7.5       54.7      628   
    35       8        48.7      487   
    36      6.58      62.9      644   
    37       5        56.6      640   
    38       7        58.6      704   
    39      8.5       66.3      648   
    40       7        67.2      968   
    41       7        62.6      587   
    42       7        56.3      699   
    43       7        60.3      632   
    44       7        50.8      591   
    45       6        67.2      782   
    46       9        57.1      510   
    47       7        62.3      610   
    48       7        59.3      524