Year	maximum value in 2004 = 100
2006	33.9874764462
2007	26.8606126171
2008	31.2446601341
2009	30.1273137487
2010	30.3791297012
2011	41.4960890933
2012	42.354922725
2013	46.4782300208
2014	46.2184395607
2015	46.3957480403
2016	47.5173120519
2017	50.9806406975
2018	49.1925303635
2019	48.9645093684
2020	48.3523875611
2021	48.1822269776