Year	Percent change (Units)
2013	2.605
2014	3.027
2015	3.223
2016	2.388
2017	1.166
2018	0.443
2019	1.412
2020	2.959
2021	4.227
2022	3.244
2023	3.378
2024	3.264
2025	2.564
2026	2.267
2027	1.988
2028	1.802
2029	1.721