Year	Percent
1996	1.93
1997	2.87
1998	2.29
1999	2.33
2000	2.26
2001	2.76
2002	2.12
2003	2.25
2004	2.14
2007	2.03
2009	1.74
2010	1.11
2011	1
2012	1.03
2013	1.32
2014	1.26
2015	1.85
2016	1.85
2017	1.87
2018	1.16
2019	2.04
2020	2.39