Year	%
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	10
1997	7.14285714285714
1998	5
1999	6.89655172413793
2000	7.14285714285714
2001	6.45161290322581
2002	8.98876404494382
2003	8.87096774193548
2004	9.88372093023256
2005	11.0091743119266
2006	12.5984251968504
2007	13.4275618374558
2008	14.4230769230769
2009	15.2492668621701
2010	15.5913978494624
2011	16.5841584158416
2012	17.2811059907834
2013	17.8879310344828
2014	18.2926829268293
2015	18.4466019417476
2016	19.3245778611632
2017	19.7106690777577
2018	20
2019	20.1030927835052
2020	20
2021	20.259319286872
2022	20.414673046252