Year	Percent change (Units)
2014	2.901
2015	3.276
2016	2.947
2017	1.560
2018	0.556
2019	1.092
2020	2.102
2021	3.424
2022	3.981
2023	3.642
2024	3.168
2025	2.728
2026	2.405
2027	2.132
2028	1.847
2029	1.758