Year Index 2004 66.208 2005 66.331 2006 81.119 2007 85.285 2008 88.571 2009 104.789 2010 98.93 2011 97.968 2012 98.282 2013 96.558 2014 106.202 2015 109.93 2016 118.961 2017 120.84 2018 124.465 2019 127.95 2020 130.829 2021 133.446 2022 136.115 2023 138.837 2024 141.614