Year	Percent change (Units)
1993	884.782
1994	1281.426
1995	116.917
1996	64.374
1997	50.227
1998	26.070
1999	25.970
2000	28.182
2001	26.483
2002	21.557
2003	8.740
2004	9.261
2005	11.377
2006	10.880
2007	11.855
2008	13.833
2009	12.356
2010	11.901
2011	13.610
2012	10.813
2013	10.804
2014	9.237
2015	8.427
2016	9.801
2017	18.782
2018	14.265
2019	15.189
2020	11.167
2021	9.983
2022	12.257
2023	8.751
2024	12.070
2025	8.603
2026	7.040
2027	5.000
2028	4.984
2029	4.967