id: 2 yr ( 10, (8, 0, 2, 0)) (( 10.7, 10.8 ), ( 5.0, 0.9 ))
 +14                      |         +10 
                       |          
                       |      2020 172018  
   +    +    +    +    +    +    +
                       |          
                       |    2011     
                       |  20152013 19      
                       |          
   +    +    +    +    +2014   +    +
                       |         
                       |          
                       |          
                       |          
---+----+----+----+----+----+----+
                       |          
                       |          
                       |          
                       |          
   +    +    +    +    +    +    +
                       |          
                       |          
           2016           |          
                       |          
   +    +    +    +    +    +    +
                       |          
                       |          
                       |          
                       |          
   +    +    +    +    +    +    +
                       |          
  2012                    |          
                       |          
 -22                      |         -26