id: 315 yr ( 9, (6, 0, 2, 1)) (( 8.6, 8.7 ), ( 2.8, 0.6 ))
 +11                     |          +9 
                      |           
  +    +    +    +    +    +   2017+ 
                      |     20142015    
                      |     2016     
                      |           
                      |           
  +    +    +    +    +  2013 +    + 
                      |           
                      |2012          
                      |           
                    2011 |           
--+----+----+----+----+----+----+-
                      |           
                   2018  |           
                      |           
                      |           
  +    +    +    +    +    +    + 
                      |           
                      |           
                      |           
                      |           
  +    +    +    +    +    +    + 
                      |           
                      |           
                      |           
                      |           
  +    +    +    +    +    +    + 
                      |           
                      |           
  2010                   |           
                      |           
 -19 +    +    +    +    +    +    +-22