Year	Percent change
1980	14.774
1981	20.143
1982	33.229
1983	12.79
1984	11.1
1985	7.51
1986	-9.888
1987	6.243
1988	0.485
1989	28.021
1990	-6.15
1991	3.4
1992	23.5
1993	62.7
1994	30.6
1995	4.4
1996	17.114
1997	-6.043
1998	-14.7
1999	0.268
2000	23.2
2001	6.894
2002	-2.11
2003	1.819
2004	33.636
2005	12.612
2006	20.606
2007	20.257
2008	22.166
2009	8.53
2010	10.499
2011	16.967
2012	36.416
2013	11.043
2014	14.856
2015	0.235
2016	-17.55
2017	5.241
2018	9.549
2019	6.009
2020	3.165
2021	3.206
2022	2.602
2023	1.909
2024	2.785