| Year | 
                  1st Quarter | 
                  2nd Quarter | 
                  3rd Quarter | 
                  4th Quarter | 
                  Annual Total | 
                  Annual NPM | 
                 
                
                      | 2020 | 
                      62 | 
                      52 | 
                      56 | 
                      112 | 
                      283 | 
                      3.5% | 
                     
					
                      | 2019 | 
                      49 | 
                      83 | 
                      48 | 
                      22 | 
                      201 | 
                      2.3% | 
                     
				  
                    
                      | 2018 | 
                      111 | 
                      87 | 
                      68 | 
                      31 | 
                      297 | 
                      2.8% | 
                     
				  
                
                  | 2017 | 
                  191.9 | 
                  130.6 | 
                  89.3 | 
                  -153.9 | 
                  257.9 | 
                  2.2% | 
                 
                
                  | 2016 | 
                  -19.2 | 
                  36.8 | 
                  42.9 | 
                  -815.4 | 
                  -754.9 | 
                  -6.8% | 
                 
                
                  | 2015 | 
                  20.8 | 
                  78.1 | 
                  20.7 | 
                  -15.0 | 
                  104.6 | 
                  1.1% | 
                 
                
                  | 2014 | 
                  63.9  | 
                  31.8  | 
                  2.3  | 
                  36.9  | 
                  134.9  | 
                  1.4% | 
                 
                
                  | 2013 | 
                  28.0  | 
                  88.5  | 
                  47.1  | 
                  -606.3  | 
                  -442.7  | 
                  -5.3% | 
                 
                
                  | 2012 | 
                  36.3  | 
                  76.4  | 
                  49.5  | 
                  -331.3  | 
                  -169.1  | 
                  -2.1% | 
                 
                
                  | 2011 | 
                  48.5  | 
                  115.2  | 
                  27.8  | 
                  35.3  | 
                  226.8  | 
                  3.2% | 
                 
                
                  | 2010 | 
                  2.9  | 
                  22.5  | 
                  -284.0  | 
                  -490.4  | 
                  -749.0  | 
                  -11.1% | 
                 
                
                  | 2009 | 
                  11.4  | 
                  161.1  | 
                  16.3  | 
                  -108.8  | 
                  80.0  | 
                  1.1% | 
                 
                
                  | 2008 | 
                  52.1  | 
                  64.6  | 
                  124.3  | 
                  6.0  | 
                  247.0  | 
                  3.8% | 
                 
                
                  | 2007 | 
                  121.8  | 
                  119.1  | 
                  141.1  | 
                  556.0  | 
                  938.0  | 
                  15.5% | 
                 
                
                  | 2006 | 
                  132.2  | 
                  139.1  | 
                  100.9  | 
                  66.1  | 
                  438.3  | 
                  7.7% | 
                 
                
                  | 2005 | 
                  64.7  | 
                  123.1  | 
                  103.5  | 
                  115.4  | 
                  406.7  | 
                  8.0% | 
                 
                
                  | 2004 | 
                  61.5  | 
                  83.4  | 
                  47.0  | 
                  55.9  | 
                  247.8  | 
                  5.2% | 
                 
               
              * From 2017.1Q, material has been based on consolidated Financial Statements 
               |