Year	%
1988	2.55
1989	2.84
1990	5.86
1991	4.32
1992	3.3
1993	3.14
1994	3.95
1995	4.23
1996	2.82
1997	2.23
1998	2.86
1999	3.31
2000	2.3
2001	3.04
2002	1.75
2003	1.68
2004	1.76
2005	1.7
2006	1.8
2007	1.67
2008	1.59
2009	1.6
2010	2
2011	1.51
2012	1.5
2013	1.47
2014	2.07
2015	2.03
2016	1.75
2017	1.87
2018	1.81
2019	1.79
2020	1.6
2021	1.67