Year	Percent
1999	1.19
2001	2.48
2002	2.79
2003	3.78
2004	1.27
2005	0.95
2007	1.73
2011	1.84
2012	1.01
2013	1.3
2014	1.91
2015	1.36
2016	2.2
2017	2
2018	2.6
2019	1.84
2020	1.64