Year | |
---|---|
2001 | 51.1 |
2002 | 50.7 |
2003 | 49.9 |
2004 | 49.4 |
2005 | 49.5 |
2006 | 50.0 |
2007 | 50.1 |
2008 | 50.4 |
2009 | 50.8 |
2010 | 51.0 |
2011 | 51.1 |
2012 | 51.0 |
2013 | 50.8 |
2014 | 50.6 |
2015 | 50.5 |
2016 | 50.3 |
2017 | 50.5 |
2018 | 50.8 |
2019 | 50.7 |
2020 | 50.2 |
2021 | 49.9 |