Year	maximum value in 2004 = 100
2006	28.647064125
2007	28.896409621
2008	36.5476929613
2009	37.3112214684
2010	39.6895745091
2011	36.875025599
2012	42.0582697356
2013	42.8302723403
2014	44.0638249691
2015	49.7161711445
2016	49.0109869469
2017	47.8162485117
2018	48.7460692691
2019	51.4435981549
2020	46.2849983359
2021	57.3662807948