Year Percent change (Units) 2015 9.152 2016 -8.635 2017 11.858 2018 1.068 2019 4.070 2020 -59.357 2021 38.145 2022 66.580 2023 4.729 2024 3.726 2025 3.556 2026 3.283 2027 3.012 2028 2.997 2029 2.997