Year	Percent change
1991	208.6
1992	325.478
1993	182.976
1994	66.3
1995	53.105
1996	44.576
1997	19.894
1998	6.132
1999	9.333
2000	8.537
2001	7.865
2002	1.736
2003	4.437
2004	11.111
2005	9.412
2006	4.839
2007	14.103
2008	23.146
2009	2.007
2010	14.49
2011	9.375
2012	14.143
2013	11.264
2014	10.686
2015	1.118
2016	0.804
2017	7.178
2018	9.674
2019	7.2
2020	7.995
2021	7.057
2022	6.869
2023	6.974
2024	7.262