Year	maximum value in 2004 = 100
2006	37.638986124
2007	38.2991614367
2008	34.7539941297
2009	40.9408555545
2010	43.2725979788
2011	39.2502362103
2012	39.4913756321
2013	43.2529554648
2014	41.0570890273
2015	43.9635213318
2016	43.7158383649
2017	43.7984357683
2018	44.7202260322
2019	51.1957057784
2020	63.4028058295
2021	68.9471968408