Year	Number
1996	100
1998	100
2000	99.5024871826172
2002	100
2003	100
2004	99.5192337036133
2005	100
2006	100
2007	100
2008	100
2009	100
2010	97.1563949584961
2011	97.6525802612305
2012	97.1830978393555
2013	97.6525802612305
2014	99.5073928833008
2015	99.5073928833008
2016	99.5073928833008
2017	99.5073928833008
2018	99.5145645141602
2019	98.5507278442383
2020	98.5507278442383
2021	99.0338134765625
2022	98.0676345825195