Year Percent change (Units) 1993 1151.641 1994 -2.990 1995 3.730 1996 3.562 1997 3.959 1998 6.019 1999 3.805 2000 5.425 2001 2.396 2002 2.850 2003 2.155 2004 1.952 2005 3.984 2006 2.113 2007 5.410 2008 2.836 2009 1.842 2010 1.732 2011 2.134 2012 4.400 2013 0.455 2014 -0.101 2015 -0.302 2016 0.707 2017 1.264 2018 0.901 2019 1.365 2020 -0.281 2021 5.196 2022 12.667 2023 5.351 2024 2.354 2025 2.175 2026 2.229 2027 2.203 2028 2.197 2029 2.203