Year	Percent change (Units)
1993	1996.627
1994	1959.704
1995	243.964
1996	39.299
1997	63.107
1998	181.749
1999	251.196
2000	107.495
2001	46.121
2002	34.792
2003	25.373
2004	14.440
2005	7.940
2006	6.620
2007	12.072
2008	13.300
2009	10.113
2010	9.927
2011	108.686
2012	21.778
2013	16.466
2014	16.220
2015	11.970
2016	10.576
2017	4.590
2018	5.642
2019	4.730
2020	7.336
2021	9.975
2022	12.876
2023	5.840
2024	6.769
2025	6.343
2026	5.600
2027	5.181
2028	5.077
2029	4.972