Year	maximum value in 2004 = 100
2006	80.3686115632
2007	72.6329901662
2008	74.8510434871
2009	70.8800225641
2010	72.6212934224
2011	74.8968898934
2012	69.0019333229
2013	67.1818971208
2014	73.9488923191
2015	76.6609866879
2016	69.898348894
2017	71.263747931
2018	78.3593442452
2019	81.8719745046
2020	87.4639453571
2021	69.663527743