Year	Percent change (Units)
2011	21.877
2012	11.305
2013	-1.116
2014	-2.528
2015	-1.519
2016	-0.313
2017	-7.430
2018	1.206
2019	-3.366
2020	-8.092
2021	4.721
2022	3.852
2023	1.640
2024	-4.554
2025	4.878
2026	2.387
2027	2.417
2028	2.433
2029	2.450