Year Percent change (Units) 1994 -1.642 1995 2.155 1996 4.943 1997 13.050 1998 4.340 1999 -0.425 2000 10.088 2001 6.004 2002 6.771 2003 7.600 2004 6.804 2005 9.526 2006 9.766 2007 7.579 2008 -5.132 2009 -14.629 2010 2.444 2011 7.263 2012 3.228 2013 1.458 2014 3.011 2015 1.853 2016 3.155 2017 5.792 2018 3.784 2019 4.034 2020 -0.965 2021 7.249 2022 -0.461 2023 -3.006 2024 -0.528 2025 2.179 2026 2.002 2027 1.923 2028 2.017 2029 2.057