Year	maximum value in 2004 = 100
2006	83.9971158275
2007	78.1535223597
2008	75.7862928486
2009	79.1385745
2010	79.4154123972
2011	76.1210409075
2012	77.3644460449
2013	76.7402957507
2014	83.1412988483
2015	85.4534181219
2016	83.915209974
2017	87.6106984031
2018	86.9488573469
2019	86.9144390407
2020	90.9508407349
2021	89.9953859418