Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2018     18.2    97.5    22.8    69.3     4.8    44.2     5.8     0.0                                        
    2017     51.8   114.3    91.4   114.8    25.9    20.3     4.1     3.8    49.8    75.7   197.6    63.5   813  
    2016    114.6    88.7    76.5    14.2    28.2    47.2    19.8    16.5    54.1   135.6   141.2   113.0   850  
    2015     82.3   134.3     0.0                     0.2     9.7    21.8    37.3    52.8    82.3   216.2        
    2014     62.0   138.9   106.7    31.8    35.6    14.0    28.4    16.2    34.0   139.7    85.1   139.9   832  
    2013     22.6    51.5    66.3    41.9    42.2     1.5     0.0    20.6     2.8     2.5    72.1    24.6   349  
    2012      4.8    31.0     5.3     0.2     5.1     0.0     8.6     3.3     3.3    87.8     5.0    11.9   166  
    2011    122.4    82.3   167.1     6.6    72.4     0.5     4.1     1.3     4.3     0.0     9.9     4.3   475  
    2010    229.6    86.1    98.8    92.7    60.7     4.0     2.0    22.8     7.1     0.0    50.6   159.5   814  
    2009     35.8    35.5    53.1    17.5    22.1    14.2    14.7     7.9    30.5                                
    2008     92.4    30.7    65.8    45.0    26.7    14.0    18.5    17.0    11.2    61.9    21.0   101.8   506  
    2007     80.8    37.8    64.2    60.9    11.7    74.7    26.2    53.1    44.9    78.8    96.7    82.0   712  
    2006                                     18.3    11.4     9.9     9.9    27.4    30.2   259.3   152.9        
 Average     29      19      12      15      26      60      93      97      76      77      68      45     612  
 Std Dev     21      23       9      14      19      50      79      68      61      40      46      37     248