id: 37 yr ( 2, (2, 0, 0, 0)) (( 2.0, 2.4 ), ( 12.8, 6.1 ))
 +15    +    +    +   +9 
|                   
|                2011  
|                   
|                   
+    +    +    +    
|                  
|                   
|                   
|       2012           
+    +    +    +    
|                   
|                   
|                   
|                   
+    +    +    +    
|                   
|                   
|                   
|                   
+    +    +    +    
|                   
|                   
|                   
|                   
+    +    +    +    
|                   
|                   
|                   
|                   
 0----+----+----+---