Year Percent change (Units) 2012 25.239 2013 -8.787 2014 9.880 2015 109.856 2016 401.732 2017 153.424 2018 31.408 2019 30.019 2020 87.709 2021 2.434 2022 -13.030 2023 70.259 2024 60.280 2025 9.100 2026 7.723 2027 7.912 2028 8.465 2029 8.033