Year	%
1988	4.78
1993	4.98
1995	6.45
1996	5.71
1997	4.42
1998	4.84
1999	3.95
2000	4.24
2001	4.69
2002	3.76
2003	3.21
2004	3.45
2005	3.47
2006	3.08
2007	3.2
2008	3.07
2009	3.06
2010	3.94
2011	4.24
2012	4.56
2013	4.85
2014	4.76
2015	4.47
2016	4.42
2017	4.07
2018	4.13
2019	5.33
2020	4.08
2021	3.9