id: 11 yr ( 10, (0, 7, 3, 0)) (( 8.5, 9.5 ), ( 11.1, 0.4 ))
 +0---+----+----+----+----+----+---+10 
                        |         
                        |      2018  
                        |         
                        |         
    +    +    +    +    +    2016    
                        |  20132017 19     
                        | 2015       
                        |         
                        2014         
    +    +    +    +   2012+    +    
                        2020         
                        |         
                        |         
                        |         
    +    +    +    +    +    +    
                        |         
                        |         
                        |         
                        |         
    +    +    +    +    +    +    
                        |         
                        |         
                        |         
                        |         
    +    +    +    +    +    +    
                        |         
                        |         
  2011                     |         
                        |         
 -36   +    +    +    +    +    +   -27