id: 301 yr ( 10, (4, 0, 0, 6)) (( 3.1, 3.5 ), ( 7.0, 0.7 ))
 +12           |                +6 
            |                 
            |           2019  2017  
            |                 
  +    +    +    +    +    +  
            |      2012    2018     
            |                 
            |                 
            |                 
  +    +    +    +    +    +  
            |                 
            |                 
            |                
            |                 
  +    +  2015 14 13 +    +    +    +  
            |                 
            |                 
          2016 |                 
            |                 
  +    +    +    +    +    +  
            |                 
            |                 
            |                 
            |                 
  2011  2020 +    +    +    +    +  
            |                 
            |                 
            |                 
            |                 
 0-+----+----+----+----+----+--5