2000: | 6.3 | 2008: | 6.5 | 2016: | 6.1 | ||
2001: | 5.8 | 2009: | 6.8 | 2017: | 7 | ||
2002: | 6 | 2010: | 6.5 | 2018: | 7 | ||
2003: | 5.5 | 2011: | 6.3 | 2019: | 7 | ||
2004: | 6.2 | 2012: | 6.6 | 2020: | 7 | ||
2005: | 5.9 | 2013: | 6.2 | 2021: | 7 | ||
2006: | 6.5 | 2014: | 6.5 | ||||
2007: | 6.1 | 2015: | 6.1 |