Year	maximum value in 2004 = 100
2006	33.4785669859
2007	34.8240742112
2008	36.3007062184
2009	35.3808802447
2010	36.5482711066
2011	33.9234166429
2012	33.7574497787
2013	35.333560294
2014	35.0932494113
2015	34.4686530123
2016	33.2720236394
2017	44.1530981528
2018	43.1997786955
2019	45.663150413
2020	34.9132492208
2021	32.7069226225