id: 11 yr ( 10, (0, 7, 3, 0)) (( 9.1, 9.8 ), ( 12.4, 0.6 ))
 +0---+----+----+----+----+----+---+10 
                        |         
                        |         
                        |      2018  
                        |    2016    
    +    +    +    +    +    +    
                        |   2017     
                        | 20152013      
                        | 2019       
                        2014         
    +    +    +    +   2012+    +    
                        |         
                        |         
                        |         
                        |         
    +    +    +    +    +    +    
                        |         
                        |         
                        |         
                 2020      |         
    +    +    +    +    +    +    
                        |         
                        |         
                        |         
                        |         
    +    +    +    +    +    +    
                        |         
                        |         
                        |         
  2011                     |         
    +    +    +    +    +    +    
 -36                       |        -27