Year	Percent change
1980	13.728
1981	13.892
1982	9.691
1983	9.292
1984	6.69
1985	4.703
1986	2.121
1987	3.115
1988	3.081
1989	3.563
1990	3.212
1991	3.264
1992	2.01
1993	2.227
1994	1.425
1995	2.121
1996	1.699
1997	1.14
1998	0.236
1999	1.347
2000	1.807
2001	1.508
2002	2.173
2003	2.42
2004	2.243
2005	1.727
2006	1.675
2007	2.787
2008	1.164
2009	0.988
2010	1.988
2011	2.634
2012	1.509
2013	0.839
2014	0.1
2015	0.301
2016	0.829
2017	1.268
2018	1.97
2019	1.231
2020	1.621
2021	1.608
2022	1.807
2023	1.868
2024	1.893