Year	annual %
1971	6.705939616736018
1972	3.1845619348346332
1973	2.003735635174664
1974	-0.24876124116477172
1975	8.310169218219059
1976	4.475706848504473
1977	7.901120739859735
1978	5.971638918199602
1979	0.6390757550605883
1980	-5.204035558239212
1981	19.20673237707129
1982	8.248014511522484
1983	4.654377458131421
1984	7.122577677072201
1985	0.5581434067497497
1986	-0.6477858652923345
1987	-3.297119447384361
1988	3.0094387816456134
1989	-0.1545482053679592
1990	-4.488339097538358
1991	-11.165913487936123
1992	-11.685889775115015
1993	-15.46802651268547
1994	-0.16490122187752831
1995	1.941326621150452
1996	7.7448682532221795
1997	2.533082185797511
1998	0.030878188000784235
1999	5.771992463058567
2000	5.392734853832977
2001	3.3228835299957495
2002	0.906670533871349
2003	3.75422391738509
2004	5.369630427220898
2005	11.270932698313914
2006	12.246684523260896
2007	6.688045572169727
2008	4.085319290251931
2009	0.4950442330068796
2010	2.6113418883443558
2011	3.468998874437929
2012	3.0752531926014512
2013	2.805395157858854
2014	0.8236233048718731
2015	4.388023887437413
2016	0.3312052813443529
2017	1.8686106188524434
2018	2.253935002813108
2019	-0.09065144602104169