Year	Percent change (Units)
1993	1662.275
1994	1401.987
1995	176.379
1996	39.180
1997	17.401
1998	7.132
1999	8.323
2000	13.154
2001	8.373
2002	5.853
2003	6.447
2004	6.868
2005	7.521
2006	8.583
2007	10.779
2008	17.148
2009	7.300
2010	7.125
2011	8.354
2012	5.118
2013	5.829
2014	6.717
2015	6.651
2016	14.556
2017	7.429
2018	6.025
2019	5.244
2020	6.799
2021	8.002
2022	14.956
2023	14.558
2024	8.671
2025	6.975
2026	6.121
2027	5.373
2028	5.058
2029	5.000