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     85     116      98      46      24      14       8      17      66      91     106     108     845  
 Std Dev     30      23      26      28      19      11       8      12      52      39      55      70      60