Year	maximum value in 2004 = 100
2006	4.9863937629
2007	7.4333549214
2008	6.007406292
2009	6.0271814112
2010	5.3215889007
2011	4.6593203154
2012	7.3366090947
2013	7.2502026888
2014	7.7514269581
2015	7.9861244117
2016	7.1487684823
2017	7.6666993552
2018	7.670323987
2019	7.8415695324
2020	7.4337942745
2021	6.5608442926