id: 4 yr ( 10, (9, 0, 1, 0)) (( 5.8, 5.8 ), ( 4.3, 2.3 ))
 +10                   |           +8 
                    |            
                    |         2018  
                    |            
+    +    +    +    +    +  2017 +  
                    |    2016  2019    
                    |   20142013       
                    |            
                    |  2015 12         
+    +    +    +    +  2020 +    +  
                    |            
                    |            
                    |            
                    |            
+----+----+----+----+----+----+--
                    |            
                    |            
                    |            
                    |            
+    +    +    +    +    +    +  
                    |            
                    |            
                    |            
                    |            
+    +    +    +    +    +    +  
                    |            
                    |            
                    |            
                    |            
+    +    +    +    +    +    +  
                    |            
  2011                 |            
                    |            
 -13                   |           -15