Year	Percent change
1981	-3.086
1982	-30.29
1983	-28.586
1984	50.793
1985	-16.959
1986	2.568
1987	40.982
1988	25.104
1989	-28.18
1990	80.386
1991	0.307
1992	-23.992
1993	33.907
1994	-46.866
1995	28.545
1996	-4.604
1997	-11.556
1998	108.332
1999	-30.181
2000	-27.803
2001	12.746
2002	49.909
2003	28.417
2004	112.082
2005	15.821
2006	35.708
2007	8.506
2008	5.431
2009	82.931
2010	144.365
2011	51.618
2012	2.689
2013	50.032
2014	14.037
2015	-14.477
2016	37.378
2017	13.684
2018	20.968
2019	14.377
2020	7.444
2021	7.52
2022	1.697
2023	2.228
2024	1.842