Year	Index
1997	11.923
1998	17.218
1999	25.036
2000	53.067
2001	67.001
2002	68.682
2003	71.503
2004	81.657
2005	94.591
2006	100
2007	111.025
2008	120.555
2009	128.514
2010	141.68
2011	151.603
2012	170.074
2013	173.808
2014	176.854
2015	179.605
2016	182.356
2017	187.858
2018	191.592
2019	196.381
2020	201.291
2021	207.33
2022	213.55
2023	219.956
2024	226.555