Year	Percent
1990	4.19353
1991	3.17128
1992	3.04297
1993	3.25266
1994	3.33811
1995	3.0096
1996	3.37884
1997	3.22941
1998	3.02882
1999	3.04757
2000	3.11043
2001	3.49688
2002	3.94503
2003	2.88741
2004	3.06161
2005	2.88586
2006	2.73103
2007	2.20601
2008	2.34209
2009	2.3011
2010	2.20434
2011	2.29232
2012	2.26771
2013	2.28529
2014	2.22036
2015	2.37528
2016	2.40425
2017	2.70397
2018	2.45711
2019	2.11308
2020	2.00927
2021	2.30025
2022	2.67553