id: 231 yr ( 7, (1, 0, 6, 0)) (( 5.4, 5.2 ), ( 6.1, 8.6 ))
 +4                           |   +1 
                            |    
                            | 2012  
                            |    
   +    +    +    +    +    +    
                            |    
                            |    
                            |    
                            |    
---+----+----+----+----+----+----
                            |    
                            |    
                   2013        |    
                            |    
   +    +    +    +    +    +    
                            |    
                2014           |    
                            |    
                            |    
   +    +    +    +    +    +    
                           |    
              2017             |    
                            |    
                            |    
   +    +    +    +    +    +    
                            |    
       2015                    |    
                            |    
                            |    
   +    +    +    +    +    +    
    2016                       |    
  2011                         |    
                            |    
 -13                           |   -15