Year	Percent change (Units)
1985	9.122
1986	12.711
1987	40.275
1988	35.510
1989	81.006
1990	36.478
1991	31.018
1992	31.857
1993	45.941
1994	70.836
1995	56.615
1996	103.243
1997	37.609
1998	29.906
1999	20.028
2000	13.431
2001	12.282
2002	31.215
2003	27.084
2004	19.185
2005	14.358
2006	16.966
2007	22.457
2008	30.900
2009	25.057
2010	27.184
2011	27.570
2012	20.068
2013	56.193
2014	68.540
2015	180.870
2016	274.354
2017	862.629
2018	130060.244
2019	9585.494
2020	2959.839
2021	686.383
2022	233.986
2023	189.981
2024	159.981
2025	150.000