id: 266 yr ( 8, (8, 0, 0, 0)) (( 2.7, 2.4 ), ( 10.0, 6.6 ))
 +15                      +11 
+    +    +    +    +   
|                    2010  
|                       
|                       
|                       
+    +    +    +    +   
|                       
|                2015      
|                       
|              2012        
+    +    +    +    +   
|          2014 2011          
|                       
|          2016            
|                       
+    +    2013    +    +   
|                       
|                       
|                       
|                       
+   2017+    +    +    +   
|                       
|                       
|                       
|                       
+    +    +    +    +   
|                       
|                       
|                       
|                       
 0----+----+----+----+--