Year | |
---|---|
1997 | 26.4 |
1998 | 21.4 |
1999 | 21.5 |
2000 | 21.2 |
2001 | 19.4 |
2002 | 20.0 |
2003 | 20.2 |
2004 | 21.4 |
2005 | 23.7 |
2006 | 20.8 |
2007 | 20.5 |
2008 | 26.4 |
2009 | 20.6 |
2010 | 32.1 |
2011 | 45.0 |
2012 | 38.5 |
2013 | 33.0 |
2014 | 33.7 |
2015 | 23.4 |
2016 | 21.2 |
2017 | 22.9 |
2018 | 21.6 |
2019 | 22.4 |
2020 | 22.8 |
2021 | 22.7 |
2022 | 24.2 |
2023 | 25.8 |
2024 | 24.8 |