Year	annual %
1961	18.089758342922906
1962	13.973884233092951
1963	19.97264021887826
1964	21.55074116305586
1965	16.67448405253284
1966	25.949748743718597
1967	7.125758059368013
1968	12.66294227188082
1969	10.221487603305778
1970	14.76216183792215
1971	18.058749738657735
1972	25.92641785097624
1973	32.749709946208206
1974	44.31378780655754
1975	23.22811525050468
1976	47.47494303542973
1977	29.411764705882355
1978	12.999609832227854
1979	14.849905737903029
1980	39.0390408446724
1981	27.217176959003638
1982	230.41740176832315
1983	172.7497191392699
1984	1428.9156444726082
1985	6987.876844130854
1986	184.37173686042465
1987	94.94492044063647
1988	27.839517799962326
1989	21.433131967977996
1990	52.865520728008086
1991	50.73288178643243
1992	34.473679591371045
1993	33.7027319836577
1994	24.21142037078619
1995	7.6577249255291555
1996	39.83793949713084
1997	18.964518025868607
1998	13.423188236240419
1999	3.2305785239107925
2000	1.5531229511930456
2001	26.021966468823177
2002	-5.801499814062018
2003	14.22090746464547
2004	-5.108574449839134
2005	13.845423805528648
2006	23.359095118394293
2007	26.94017770089871
2008	24.691554788902938
2009	10.128223510549034
2010	12.633709892338482
2011	22.96629093600348
2012	19.368503685142343
2013	18.108705229731594
2014	15.643839512598792
2015	13.140045089471055
2016	0.002490991771996164
2017	9.990157420602467
2018	4.13051568387533
2019	-1.5614816070535282
2020	9.279325006904013
2021	6.358249516239957