Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2017     46.2   101.8   108.4    52.6    28.5    28.2     0.2     8.6    26.7   104.1    29.5                
    2016     87.9   136.1    87.4    14.0    10.4    22.1    12.4     4.0    41.7   113.5   115.0   132.3   777  
    2015    118.9    90.9    92.7    20.6     1.3     4.1    18.3    26.4    53.8   111.2   178.5   174.7   891  
    2014     86.9   135.9   135.1    59.7    29.5     4.8     8.6    12.7    50.8   102.9   125.7   115.8   868  
    2013                     65.0    81.5    51.1    11.9     0.5    31.2   157.7    22.3    80.8    10.9        
 Average     98      46      24      14       8      17      66      91     106     108      85     116     845  
 Std Dev     26      28      19      11       8      12      52      39      55      70      30      23      60