Year	Percent
1990	2.90051
1991	3.10171
1992	2.47398
1993	2.38819
1994	1.41053
1995	1.80142
1996	1.90064
1997	1.87447
1998	1.61225
1999	1.60081
2000	1.25474
2001	1.25172
2002	1.25007
2003	1.15414
2004	0.63932
2005	0.67208
2006	1.16076
2007	1.34397
2008	1.33683
2009	1.30954
2010	1.30275
2011	1.28321
2012	1.252
2013	1.22779
2014	1.58563
2015	1.58506
2016	1.55238
2017	1.56301
2018	1.54037
2019	1.52059
2020	1.62095