Year	Number
1996	100
1998	100
2000	100
2002	100
2003	99.4974899291992
2004	98.5436859130859
2005	99.0291290283203
2006	96.1352691650391
2007	92.7536239624023
2008	95.6730804443359
2009	94.7867279052734
2010	95.2606658935547
2011	99.052131652832
2012	99.5260696411133
2013	99.052131652832
2014	97.1428604125977
2015	93.8095245361328
2016	92.3809509277344
2017	93.8095245361328
2018	91.0377349853516
2019	92.4528274536133
2020	92.9245300292969
2021	94.3396224975586
2022	87.7358474731445