Year % 2002 10.525091342281817 2003 14.05459537099934 2004 15.747133613214775 2005 14.417005234583923 2006 13.156384156073571 2007 16.26640697595538 2008 21.24530357818548 2009 23.457787194342515 2010 20.182729348882717 2011 14.537393935626358 2012 13.450014441235126 2013 12.87829752926811 2014 29.288071416856788 2015 33.089842377357556 2016 17.464901767827204 2017 23.02036437905876 2018 19.432227553758015 2019 17.45854683018659 2020 14.612616302557488 2021 22.641199531269457 2022 16.092586222094326 2023 16.62482281711086