Year	maximum value in 2004 = 100
2006	32.7158603686
2007	31.7661304615
2008	25.0204166259
2009	31.4261695324
2010	30.5781719177
2011	38.5994633127
2012	40.4683344606
2013	42.2182467217
2014	46.2843317619
2015	41.1983000124
2016	45.3168939736
2017	48.4963221664
2018	58.5898336811
2019	60.0209156049
2020	60.3079108584
2021	60.1012367189