Year	years
1998	5
1999	5
2000	5
2001	5
2002	5
2003	5
2004	5
2005	5
2006	5
2007	4.5
2008	4.5
2009	4.5
2010	4.5
2011	4.5
2012	4.5
2013	4.5
2014	4.5
2015	4.5
2016	4.5
2017	4.5
2018	4.5
2019	4.5
2020	4.5
2021	4.5
2022	4.5
2023	4.5