id: 11 yr ( 11, (1, 8, 2, 0)) (( 9.3, 10.3 ), ( 9.6, 2.1 ))
 +5    +    +    +    +    +    +   +18 
                    |              
                    |           2021  
                    |              
                    |              
+----+----+----+----+----+----+----
                    |              
                    |              
                    |     2018        
                    |   2016          
+    +    +    +    +  2017 132019+    +    
                    |2015             
                    2014              
                   20122020              
                    |              
+    +    +    +    +    +    +    
                    |              
                    |              
                    |              
                    |              
+    +    +    +    +    +    +    
                    |              
                    |              
                    |              
                    |              
+    +    +    +    +    +    +    
                    |              
                    |              
  2011                 |              
                    |              
 -36    +    +    +    +    +    +   -27