Year	Number
1996	100
1998	100
2000	100
2002	100
2003	99.4974899291992
2004	99.5145645141602
2005	99.5145645141602
2006	99.5169067382813
2007	100
2008	99.5192337036133
2009	97.1563949584961
2010	97.1563949584961
2011	99.052131652832
2012	93.3649291992188
2013	94.7867279052734
2014	94.7619018554688
2015	91.9047622680664
2016	92.3809509277344
2017	91.9047622680664
2018	93.8679275512695
2019	95.2830200195313
2020	94.3396224975586
2021	94.8113174438477
2022	94.3396224975586