Year	Number
1996	100
1998	100
2000	100
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	98.1042633056641
2010	97.1563949584961
2011	97.1830978393555
2012	96.2441329956055
2013	98.1220626831055
2014	99.014778137207
2015	99.5073928833008
2016	99.5073928833008
2017	99.5073928833008
2018	99.5145645141602
2019	96.1352691650391
2020	97.101448059082
2021	97.5845413208008
2022	96.1352691650391