Year Index 2002 31.263 2003 42.413 2004 49.351 2005 54.566 2006 58.269 2007 63.327 2008 80.057 2009 74.604 2010 76.229 2011 85.227 2012 90.717 2013 97.417 2014 101.97 2015 101.296 2016 105.736 2017 110.998 2018 111.693 2019 113.815 2020 117.799 2021 123.099 2022 129.254 2023 135.717 2024 142.503