Year	maximum value in 2004 = 100
2006	46.9971737433
2007	45.1184400632
2008	47.4090476722
2009	45.5020786847
2010	46.4001607958
2011	51.7730817488
2012	52.3779286795
2013	54.0266219116
2014	55.6266693031
2015	55.5437539198
2016	56.0794476654
2017	56.928303866
2018	55.2072911093
2019	61.1718524244
2020	68.5087319001
2021	66.6745889083