Year Percent change (Units) 1995 27.486 1996 13.003 1997 20.585 1998 5.240 1999 14.307 2000 9.405 2001 5.871 2002 -3.049 2003 9.091 2004 17.070 2005 7.230 2006 41.468 2007 9.690 2008 7.999 2009 0.628 2010 15.769 2011 8.703 2012 12.244 2013 4.195 2014 6.322 2015 -1.120 2016 4.433 2017 9.420 2018 -2.567 2019 1.436 2020 -9.582 2021 14.618 2022 5.282 2023 1.137 2024 2.960 2025 4.207 2026 4.511 2027 5.020 2028 5.361 2029 4.957