id: 81 yr ( 6, (1, 0, 4, 1)) (( 5.0, 5.2 ), ( 2.9, 5.9 ))
 +5                           |    +2 
                            |     
                            |  2018  
                            |     
   +    +    +    +    +    +    +
                            |     
                          2016 |     
                            |     
                            |     
---+----+----+----+----+----+----+
                            |     
                            |     
                            |     
                            |     
   +    +    +        +    +    +
                            |     
              2014 2017 15           |     
                            |     
                            |     
   +    +    +    +    +    +    +
                            |     
                            |     
                            |     
                            |     
   +    +    +    +    +    +    +
                            |     
                            |     
                            |     
                            |     
   +    +    +    +    +    +    +
  2013                         |     
                            |     
 -12                           |    -15