Year	Percent change (Units)
1996	17.395
1997	97.167
1998	-13.563
1999	29.177
2000	33.650
2001	28.573
2002	10.489
2003	-4.433
2004	31.230
2005	21.430
2006	12.879
2007	10.959
2008	2.026
2009	4.262
2010	31.695
2011	24.367
2012	12.697
2013	22.761
2014	15.184
2015	14.963
2016	13.134
2017	9.913
2018	14.651
2019	13.852
2020	-1.132
2021	-6.730
2022	15.747
2023	11.624
2024	4.241
2025	6.382
2026	6.693
2027	6.913
2028	6.927
2029	7.007