Year	%
1997	3.73134328358209
1999	8
2000	8
2001	8
2003	3.75
2004	6.875
2005	6.875
2006	6.875
2007	7.8740157480315
2008	7.8740157480315
2010	12.5
2011	12.5
2012	17.4863387978142
2013	17.4863387978142
2014	20.5298013245033
2015	20.5298013245033
2016	20.5298013245033
2017	19.205298013245
2018	19.205298013245
2019	15.8940397350993
2020	17.8807947019868
2021	17.8807947019868
2022	18.5430463576159
2023	18.5430463576159