Year	annual %
1967	10.836769128040743
1968	-0.31155392922660496
1969	1.5779954644028038
1970	2.2417385156517042
1971	5.146341932650117
1972	0.032382438025862825
1973	26.562233856709085
1974	11.946024359070321
1975	-12.787186799704557
1976	12.387871667640326
1977	21.73060125938224
1978	17.89120790790824
1979	3.3571991430963948
1980	-2.1021180489138374
1981	1.7677472924454491
2008	3.3292705211807316
2009	-5.0180553492190825
2010	3.3014259584278136
2011	-1.8282903538692494
2012	2.849905676390918
2013	0.4721662070659107
2014	-0.8191781777087357
2015	3.97343885657034
2016	4.8133404534462585
2017	-3.5515248702267854
2018	4.16199371933989
2019	-1.9147653640753077
2020	-5.7943444929571655
2021	-3.132891681651188
2022	4.619696159888505