Year	Percent
1990	26.50068
1991	30.48278
1992	26.05963
1993	27.10955
1994	32.34566
1995	25.34446
1996	24.96158
1997	20.12792
1998	18.148
1999	18.39951
2000	16.08486
2001	14.83746
2002	13.95464
2003	12.42566
2004	10.98802
2005	9.08684
2006	7.09157
2007	6.70298
2008	5.59581
2009	6.12193
2010	5.52125
2011	5.07565
2012	5.13977
2013	5.36626
2014	5.31941
2015	6.17745
2016	5.60495
2017	5.60737
2018	5.21251
2019	5.69526
2020	6.73895
2021	5.72598
2022	4.76455