Year	%
1988	6.51
1993	6.47
1995	6.16
1996	5.96
1997	4.65
1998	4.28
1999	3.17
2000	3.06
2001	3.43
2002	2.38
2003	1.31
2004	1.27
2005	1.21
2006	1.21
2007	1.17
2008	1.09
2009	0.99
2010	1.12
2011	1.11
2012	1.09
2013	1.02
2014	1.01
2015	0.99
2016	0.98
2017	0.98
2018	0.96
2019	0.87
2020	0.87
2021	0.87