Year Index (Units) 2004 31.803 2005 43.557 2006 66.743 2007 87.322 2008 89.652 2009 87.141 2010 89.258 2011 94.260 2012 100.000 2013 101.879 2014 104.157 2015 105.609 2016 106.093 2017 106.305 2018 106.679 2019 106.466 2020 107.078 2021 113.547 2022 119.210 2023 124.474 2024 129.453 2025 134.631 2026 139.747 2027 145.057 2028 150.424 2029 155.840