id: 50 yr ( 5, (5, 0, 0, 0)) (( 4.9, 4.6 ), ( 5.3, 5.8 ))
 +15    +    +    +    +    +    +15 
|                              
|                           2010  
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +   +    +    +    +
|                              
|        2014 12                     
|                              
|       2013                      
+    +    +    +    +    +    +
|                              
|                              
|   2011                          
|                              
 0----+----+----+----+----+----