Year Percent change (Units) 1995 -9.591 1996 8.738 1997 30.000 1998 13.838 1999 6.102 2000 46.850 2001 -3.059 2002 10.200 2003 13.223 2004 4.662 2005 10.671 2006 1.473 2007 9.059 2008 -11.507 2009 8.791 2010 3.886 2011 15.459 2012 14.674 2013 17.107 2014 0.417 2015 4.634 2016 8.711 2017 11.629 2018 10.233 2019 9.998 2020 -36.494 2021 24.586 2022 40.209 2023 9.283 2024 -9.995 2025 5.045 2026 5.978 2027 3.858 2028 6.129 2029 3.828