Year	annual % change
1998	28.6613006592
1999	-7.8000001907
2000	-19.1431522369
2001	-17.2802944183
2002	-8.1199998856
2003	43.9900016785
2004	18.2700004578
2005	8.3791973286
2006	78.5347483738
2007	45.26685842122086
2008	-16.9578034936
2009	-1.6538113352
2010	13.095042865223473
2011	-17.7216258484154
2012	-14.6981818508716
2013	0.479967389350744
2014	-3.13549760434075
2015	-13.2262873657696
2016	31.5192751166751
2017	14.9795988758642
2018	-11.13867881029
2019	8.04480138798137
2020	-2.80829452733041
2021	12.0860281404324
2022	-30.0143572542359