2000: | 5.4 | 2008: | 6.4 | 2016: | 8.2 | ||
2001: | 5.1 | 2009: | 7.1 | 2017: | 6 | ||
2002: | 4.8 | 2010: | 7.5 | 2018: | 6 | ||
2003: | 5.1 | 2011: | 6.5 | 2019: | 6 | ||
2004: | 5.5 | 2012: | 7.1 | 2020: | 4 | ||
2005: | 6.9 | 2013: | 7.3 | 2021: | 4 | ||
2006: | 6.2 | 2014: | 7.5 | ||||
2007: | 5.8 | 2015: | 9.2 |