2000: | 7.3 | 2008: | 5.9 | 2016: | 4.4 | ||
2001: | 5.2 | 2009: | 5.4 | 2017: | 5 | ||
2002: | 5.8 | 2010: | 4.5 | 2018: | 4 | ||
2003: | 6.1 | 2011: | 4.6 | 2019: | 4 | ||
2004: | 7.5 | 2012: | 5.2 | 2020: | 5 | ||
2005: | 7.1 | 2013: | 5 | 2021: | 4 | ||
2006: | 6.3 | 2014: | 4.9 | ||||
2007: | 6.2 | 2015: | 4.5 |