Year	maximum value in 2004 = 100
2006	6.6430616383
2007	3.8295442155
2008	5.8387455843
2009	6.341457695
2010	6.5627237836
2011	6.9883205746
2012	8.1476889968
2013	8.7285540924
2014	9.3293994197
2015	10.556902079
2016	11.549036834
2017	9.0140980475
2018	10.7327348337
2019	10.9737305996
2020	9.2595097607
2021	8.6811645566