| Series | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A/T8A Composite | 8.0 | 0.9 | 10.3 | 18.4 | (14.4) | ||||||
| B | 0.6 | 9.9 | (14.3) | ||||||||
| C | 0.4 | 9.8 | (14.3) | ||||||||
| F | 3.3 | 2.0 | 11.7 | 19.6 | (12.5) | ||||||
| AA | (2.4) | 8.0 | (0.4) | 8.4 | 7.6 | 13.8 | 8.0 | 0.9 | 10.4 | 17.1 | |
| BB | (2.7) | 7.7 | (0.7) | 8.0 | 7.1 | 13.3 | 7.4 | 0.4 | 9.9 | 16.4 | |
| CC | 7.1 | 13.3 | 7.4 | 0.4 | 9.8 | 16.4 | |||||
| FF | (1.9) | 8.9 | 0.3 | 9.0 | 8.3 | 14.4 | 8.8 | 1.8 | 11.4 | 18.2 | |
| T8A | (2.4) | 8.1 | (0.4) | 8.4 | 7.6 | 13.8 | 8.0 | 0.9 | 10.3 | 18.4 | (14.4) |
| T8B | (2.7) | 7.7 | (0.7) | 8.1 | 7.2 | 13.3 | 7.5 | 0.6 | 9.9 | 17.9 | (14.2) |
| T8C | (2.7) | 7.7 | (0.7) | 8.1 | 7.2 | 13.4 | 7.5 | 0.4 | 9.8 | 17.9 | (14.3) |
| L | (2.7) | 7.7 | (0.7) | 8.0 | 7.1 | 13.2 | 7.4 | 0.8 |
