Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2013    150.3   104.8   231.5   123.4    81.4    38.1     0.0    42.1   151.1    46.2   107.9    24.1  1101  
    2012    317.1   138.6   226.4    75.8    31.6    40.3    20.0     1.0     5.3   237.1   216.4   315.2  1625  
    2011    291.2   181.1   236.8   147.4    86.0    10.4    13.7    30.2   119.9   136.1   260.3   160.9  1674  
    2010    288.3    70.7   138.0   129.2   130.3    28.9     2.0    20.1   157.8   145.2   176.4   327.6  1614  
    2009                                     83.8    13.7    11.2    12.7    88.6   218.8   529.8   100.4        
    2008                      5.3     0.0                     0.0                     0.0    11.1     0.0        
    2007             40.1     0.0             0.0     0.0     0.0     0.0     0.2    25.7                        
 Average    262     107     140      95      69      22       7      18      87     116     217     155    1503  
 Std Dev     75      55     112      59      46      16       8      17      70      94     176     141     269