id: 12 yr ( 4, (0, 0, 0, 4)) (( 1.1, 1.1 ), ( 2.3, 2.9 ))
 +5                         +0 
 +    +    +    +    +    +
                    2012     |
                          |
                          |
                          |
 +    +    +    +    +    +
                          |
                          |
                          |
                          |
 +    +    +    +    +    +
                         |
                          |
  2011     2014                 |
                          |
 +    +    +    +    +    +
                          |
                          |
                          |
  2013                       |
 +    +    +    +    +    +
                          |
                          |
                          |
                          |
 0+----+----+----+----+-----4