Year	%
1997	3.61
1998	2.87
1999	2.08
2000	3.22
2001	1.93
2002	3.16
2003	1.41
2004	2.44
2010	3.8
2011	3.91
2012	3.05
2013	4.84
2014	4.87
2019	7.2
2020	7.7