Year Percent change (Units) 2002 3.065 2003 2.764 2004 3.317 2005 3.272 2006 3.012 2007 4.078 2008 0.884 2009 0.999 2010 1.703 2011 2.161 2012 1.057 2013 0.178 2014 -0.867 2015 -0.527 2016 0.943 2017 2.371 2018 0.502 2019 0.948 2020 -0.546 2021 3.281 2022 7.151 2023 4.562 2024 3.800 2025 2.000 2026 1.930 2027 1.700 2028 1.700 2029 1.700