Year Percent change (Units) 2000 1.247 2001 -17.289 2002 9.508 2003 -15.754 2004 23.941 2005 0.226 2006 -3.113 2007 -7.777 2008 -0.397 2009 12.804 2010 7.179 2011 -10.096 2012 13.722 2013 -0.568 2014 20.442 2015 5.056 2016 -3.032 2017 22.663 2018 8.346 2019 11.126 2020 2.814 2021 0.502 2022 11.304 2023 17.197 2024 4.023 2025 -2.682 2026 3.405 2027 3.649 2028 5.118 2029 2.703