Year	annual %
1967	7.087784220667913
1968	-3.875367339187221
1969	-2.012212609043786
1970	-1.3117647955761242
1971	1.535442430287489
1972	-3.373894304052868
1973	22.283909651465294
1974	8.161246033301367
1975	-15.713761911544296
1976	8.783346596399483
1977	18.161068272401536
1978	14.634176280034225
1979	0.5104379176230367
1980	-4.797371215144551
1981	-1.0324632821315731
2008	2.7311044204670907
2009	-5.6872222667515615
2010	2.607999266081464
2011	-2.5475916096702065
2012	1.9969101594239191
2013	-0.45899691136041554
2014	-1.8275815255226178
2015	2.830944784931617
2016	3.5739367046052166
2017	-4.739903320845102
2018	2.863533048694535
2019	-3.134825246708118
2020	-6.981182789877877
2021	-4.294301414628535
2022	3.5139372167281664