Year        1        2        3        4        5        6        7        8        9       10       11       12    Total
    2018    283.5    55.3    32.7                    26.7     9.1     1.8                                        
    2017     84.1   129.3   145.3   114.1    47.5    43.2     4.1     7.4    33.0   105.6   354.3    93.7  1161  
    2016    187.4   142.7   195.3    23.9    45.0    72.6    21.1    32.8    48.0   287.8   288.8    93.7  1439  
    2015    101.1   174.2   115.3    32.2     5.8    37.6    15.5    53.3    46.0    71.1    69.1   273.0   994  
    2014     72.4   161.5   131.1    54.6    30.2    14.0    30.2    19.6    40.9   237.5   127.0   231.1  1150  
    2013                                             37.3     0.2    53.3    98.3    15.5   114.5    39.1        
 Average    146     133     124      56      32      39      13      28      53     144     191     146    1186  
 Std Dev     89      47      59      41      19      20      11      22      26     115     124     100     185