Year	%
1989	3.479106
1990	3.290311
1991	3.640425
1992	3.621849
1993	3.649655
1995	2.404806
1996	2.096178
1997	0.022564
1998	2.396659
1999	2.206745
2000	2.083959
2001	1.949744
2002	2.373789
2003	2.088727
2004	2.107989
2005	2.211174
2006	2.123947
2007	2.977224
2008	2.886477
2009	2.777158
2010	2.880878
2011	2.677168
2012	2.685833
2013	2.510761
2014	2.695076
2015	2.734098
2016	2.641872
2017	1.617376
2018	1.42205
2019	1.633823
2020	1.376568
2021	0.4981647