2000: | 7.7 | 2008: | 7.7 | 2016: | 7.7 | ||
2001: | 7.7 | 2009: | 7.7 | 2017: | 7.7 | ||
2002: | 7.8 | 2010: | 7.7 | 2018: | 7.7 | ||
2003: | 7.8 | 2011: | 7.7 | 2019: | 7.7 | ||
2004: | 7.7 | 2012: | 7.7 | 2020: | 7.7 | ||
2005: | 7.7 | 2013: | 7.7 | 2021: | 8 | ||
2006: | 7.7 | 2014: | 7.7 | ||||
2007: | 7.7 | 2015: | 7.7 |