Year Percent change (Units) 2001 -14.663 2002 1.745 2003 -7.351 2004 4.332 2005 -5.279 2006 7.459 2007 -2.430 2008 -0.429 2009 1.612 2010 13.701 2011 -0.466 2012 -16.126 2013 22.307 2014 45.539 2015 4.613 2016 3.856 2017 -22.798 2018 -29.287 2019 37.080 2020 -51.339 2021 19.356 2022 47.857 2023 30.832 2024 8.273 2025 13.784 2026 6.384 2027 6.863 2028 8.869 2029 2.987