Year	Number
2009	100
2010	100
2011	100
2012	98.591552734375
2013	98.591552734375
2014	100
2015	100
2016	100
2017	100
2018	99.5145645141602
2019	100
2020	99.5169067382813
2021	99.5169067382813
2022	99.0338134765625