Year Percent change (Units) 2015 8.384 2016 3.001 2017 -2.638 2018 0.932 2019 -2.465 2020 -1.701 2021 1.269 2022 6.554 2023 23.140 2024 9.503 2025 2.376 2026 2.200 2027 -0.368 2028 2.555 2029 2.369