Year	Percent
1995	3.8846
1996	4.38898
1997	4.30221
1998	4.15041
1999	3.81738
2000	3.74531
2001	3.67764
2002	3.48902
2003	3.43116
2004	3.12833
2005	2.76905
2006	2.41168
2007	2.50795
2008	2.36846
2009	2.26545
2010	2.43113
2011	2.37327
2012	2.40829
2013	2.6215
2014	2.53523
2015	2.73409
2016	2.82425
2017	2.78703
2018	2.75622
2019	2.46894
2020	2.8115
2021	2.73078
2022	2.33835