Year	Percent
1990	7.16184
1991	10.84298
1992	14.48441
1993	10.0234
1994	10.57675
1995	10.61094
1996	10.66768
1997	10.43231
1998	10.86172
1999	10.51768
2000	10.09628
2001	9.74512
2002	10.17012
2003	11.53878
2004	11.55399
2005	9.73619
2006	8.98937
2007	8.93242
2008	11.44352
2009	10.37017
2010	10.1206
2011	9.35099
2012	9.10472
2013	10.02748
2014	10.17757
2015	9.72692
2016	9.17291
2017	7.87325
2018	8.4704
2019	8.13229
2020	8.56904
2021	7.14754
2022	8.124