Year Percent change (Units) 2009 -7.670 2010 3.217 2011 4.920 2012 2.914 2013 0.331 2014 -0.796 2015 -2.473 2016 -0.898 2017 3.430 2018 42.074 2019 521.150 2020 348.586 2021 60.737 2022 243.760 2023 778.796 2024 602.657 2025 533.557 2026 501.392 2027 470.729 2028 441.502 2029 400.000