Year	maximum value in 2004 = 100
2006	29.7507991906
2007	22.714187685
2008	28.0973116025
2009	25.5683819107
2010	25.5667984802
2011	38.1936999736
2012	38.7349219847
2013	43.7204805851
2014	42.9997365947
2015	42.9102165412
2016	44.3347424126
2017	47.1412900372
2018	46.9945201589
2019	47.4982570108
2020	46.5399267691
2021	45.8153042356