Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2023     32.0    59.9    24.6    18.3    12.7    20.3    12.2     0.5     8.1                                
    2022    114.8    53.8    53.3    58.2    28.7    32.2    13.0     0.2     0.2    75.9    64.5    78.2   573  
    2021      2.8                                                     0.5    79.0    86.3   267.2   112.7        
    2020     82.0     2.0    35.3    24.6    29.2    20.6     7.6    16.0    40.1    89.1     4.3     8.8   360  
    2019     92.5    20.3    15.8    26.9    25.7     8.4    14.7    14.2    49.0    56.9    35.0    94.0   453  
    2018      2.2    43.9    12.7    53.6     7.6    11.2     0.0     1.0     6.8    31.0   101.1    57.1   328  
    2017     23.6    53.6    68.3    33.8    15.0    11.4     1.3     1.0    12.4    59.9    64.3    66.0   411  
    2016     46.2    87.1    52.1    10.2     6.6    20.3     7.1     6.3    27.2    99.0    62.7    84.6   509  
    2015     73.7    63.0    64.0     8.6     1.0     2.8    12.2    20.8    30.5    86.6   126.7    92.4   582  
    2014     71.9    93.0    91.7    36.6    19.3     3.6     4.8    11.2    41.6    75.5    75.7    67.6   592  
    2013     63.7    45.7    80.0    67.3    40.1    11.4     0.0     7.1   124.5    15.5    59.2    33.0   547  
    2012     89.7    25.9    53.3    33.3    17.5    33.8    14.2     1.8     0.8   152.9    35.0   108.7   567  
    2011    140.2    62.2    75.7    72.4    57.7     4.3    13.5     8.4    23.1    60.7   114.3    49.5   682  
    2010     94.7    22.6    55.9    29.2    34.8    13.2     1.0    16.3    39.6    41.6    57.9   142.5   549  
    2009     90.4    20.8    39.9    40.6    37.9     3.8     6.6    16.5    33.3   102.3   175.3    43.4   611  
    2008     36.8    25.4    32.8    17.8     8.9    10.7     4.8    23.9     7.9    33.0   128.3    59.9   390  
    2007    137.6    47.7    67.3    19.8     7.4    14.5    19.8     7.6     8.9    36.8    39.4    87.4   494  
    2006     57.9    23.6    17.0    22.1    14.2    13.2     1.8     3.0    20.8    28.2   202.4    73.9   478  
 Average     70      44      49      34      21      14       8       9      31      67      95      74     507  
 Std Dev     41      25      24      19      15       9       6       8      31      35      68      32      98