Year	maximum value in 2004 = 100
2006	73.479682703
2007	76.4410125464
2008	77.6598451971
2009	79.8011618452
2010	79.6430090616
2011	78.1657944462
2012	80.3770907727
2013	78.1197403073
2014	82.2476467649
2015	86.3885287951
2016	83.5441363106
2017	84.3734142636
2018	85.3864088176
2019	89.5359564294
2020	87.7538919455
2021	86.963734508