| Series | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 7.1 | 3.8 | (9.8) | 10.8 | 23.3 | 27.7 | 2.4 | (6.0) | 3.0 | 21.8 | (45.4) |
| B | 6.6 | 3.2 | (10.3) | 10.2 | 22.7 | 27.2 | 1.9 | (6.5) | 2.5 | 21.2 | (45.7) |
| C | 22.7 | 27.1 | 1.9 | (6.5) | 2.5 | 21.2 | (45.8) | ||||
| F | 8.1 | 5.2 | (8.9) | 11.8 | 24.2 | 28.7 | 3.3 | (5.2) | 4.0 | 23.0 | (44.3) |
| T8A | 7.1 | 3.8 | (9.8) | 10.8 | 23.3 | 27.8 | 2.5 | (6.0) | 2.9 | 21.8 | (45.3) |
| T8B | 6.6 | 3.6 | (10.2) | 10.3 | 22.8 | 27.2 | 2.0 | (6.5) | 2.5 | 21.2 | (45.7) |
| T8C | 6.7 | 3.3 | (10.2) | 10.3 | 22.8 | 27.0 | 1.9 | (6.5) | 2.4 | 21.2 | (45.5) |
| L | 6.5 | 3.2 | (10.3) | 9.7 | 22.2 | 26.9 | 2.0 | (5.0) |
