id: 252 yr ( 6, (5, 1, 0, 0)) (( 2.3, 2.0 ), ( 2.6, 4.4 ))
 +7                             +8 
|                              
|                           2013  
+    +    +    +    +    +    +
|                              
|                              
|                    2014         
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +   2016 15+    +    +    +
|                             
|                              
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+----+----2018----+----+----+----+
|                              
|                              
|  2017                           
|                              
 -1    +    +    +    +    +