Year	Percent change
1980	7.052
1981	25.442
1982	26.859
1983	15.614
1984	5.245
1985	14.992
1986	26.436
1987	16.624
1988	7.862
1989	4.685
1990	8.528
1991	10.744
1992	18.716
1993	12.287
1994	20.132
1995	17.543
1996	10.241
1997	26.934
1998	13.681
1999	6.497
2000	6.425
2001	5.375
2002	2.168
2003	9.227
2004	7.808
2005	13.456
2006	15.216
2007	13.08
2008	7.276
2009	9.231
2010	18.093
2011	14.229
2012	6.224
2013	14.684
2014	7.874
2015	9.174
2016	10.744
2017	2.442
2018	7.453
2019	7.286
2020	5.53
2021	6.565
2022	6.71
2023	7.237
2024	7.046