Year	%
1989	2.44
1990	2.51
1991	2.41
1992	2.31
1993	1.89
1995	1.91
1996	2.36
1997	1.66
1998	3.15
1999	3.67
2000	2.35
2001	2.04
2002	1.91
2003	1.44
2004	1.36
2005	1.33
2006	1.28
2007	1.32
2008	1.07
2009	1.3
2010	1.21
2011	1.36
2012	1.49
2013	1.42
2014	1.48
2015	1.51
2016	1.54
2017	2.25
2018	1.71
2019	80.1
2020	1.38
2021	1.03