Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2021    104.9    80.8    34.3    19.3    15.2     8.6     0.0     2.8                                        
    2020     34.8            26.7    23.9    27.9    19.3     7.6    15.8    40.4    77.7   106.2   139.7        
    2019     71.6    28.9    21.3    35.0    28.7     9.6    15.5    18.0    48.0    44.4    55.6    16.2   393  
    2018     78.7    82.8     7.1    11.7     9.6    19.3     0.0     2.5    27.7    45.2   100.6   105.7   491  
    2017     26.4    74.7    73.1    37.6    22.8    11.7     1.3     1.5    14.0    93.2   131.6    62.2   550  
    2016     55.1     0.8     8.6    11.9     8.6    26.2     7.4     7.1    28.2   108.4    77.5   129.5   469  
    2015     88.1    70.3    74.9    10.1     2.0     4.3     9.6    25.6    39.9   106.4   163.1   136.4   731  
    2014     77.7   121.9    96.3    40.9    18.0     5.3     5.1    13.0    38.3    76.7    93.7    72.6   660  
    2013     55.3    41.4    66.0    68.1    41.4    15.8     0.2    22.1    82.8    13.4    62.5    41.9   511  
    2012             78.2    65.0    38.1    25.9    39.9    18.8     3.3     1.5   125.5    98.3   110.2        
 Average     64      47      30      20      16       7      11      36      77      99      90      66     543  
 Std Dev     35      31      18      12      11       7       9      23      36      33      44      25     115