Year	maximum value in 2004 = 100
2006	11.0199648473
2007	9.2968628137
2008	10.164689025
2009	9.5885355274
2010	11.0433324226
2011	10.5673486098
2012	9.9078295027
2013	9.9683913261
2014	11.4142105199
2015	13.1093862431
2016	13.4557875276
2017	12.277666841
2018	12.0946660784
2019	12.6028856061
2020	12.8425180087
2021	12.2292992498