Year	%
1989	5.81
1990	5.26
1993	5.95
1995	4.84
1996	3.72
1997	7.19
1998	2.39
1999	3.25
2000	2.76
2001	2.49
2002	3.83
2003	2.66
2004	2.44
2005	2.41
2006	2.31
2007	2.01
2008	2.52
2009	1.44
2010	1.85
2011	1.87
2012	1.61
2013	1.51
2016	2.35
2017	2.28
2018	2.29
2019	2.57
2020	2.74
2021	2.3