Year	Percent
1995	7.17804
1996	7.26248
1997	6.32228
1998	6.0365
1999	5.31042
2000	4.93446
2001	4.91439
2002	4.2608
2003	3.90187
2004	4.35241
2005	3.72139
2006	3.53561
2007	3.48656
2008	3.45297
2009	3.05645
2010	3.03417
2011	3.99524
2012	3.89109
2013	3.91709
2014	3.93604
2015	3.78956
2016	3.89013
2017	3.7542
2018	3.48637
2019	3.33241
2020	3.3905
2021	3.48665
2022	3.23757