Year	annual %
1961	21.428571428571427
1962	35.294117647058826
1963	17.391304347826086
1964	23.333333333333332
1965	16.216216216216218
1966	17.05426356589147
1967	26.490066225165563
1968	21.465968586387437
1969	15.660919540229884
1970	19.875776397515526
1971	33.26424870466321
1972	-13.403810264385694
1973	22.65659866364591
1974	41.62593150342951
1975	37.100812035640864
1976	40.69829171071741
1977	63.167350097624066
1978	3.9089293321863194
1979	57.73192812931147
1980	142.5955733378172
1981	829.3069777078557
1982	141.84756416403195
1983	206.8703580269471
1984	510.1844487618372
1985	168.5459851822334
1986	20.750873699684146
1987	27.237785939903087
1988	22.25129837629219
1989	21.068064059948327
1990	19.422920036739207
1991	17.725886931202226
1992	26.468267998833383
1993	21.966326310611954
1994	24.593385980472153
1995	21.67365105387427
1996	24.98485222826538
1997	14.954413919338982
1998	19.652535550482508
1999	15.538637474191194
2000	8.020642905152297
2001	8.61029384742376
2002	11.044869217936771
2003	-0.06677647730130201
2004	7.231006954295882
2005	10.032018505485855
2006	6.944902709748543
2007	-20.42963723288498
2008	12.51884974902956
2009	5.789037190005991
2010	3.1326536554844986
2011	11.556305362535115
2012	6.300583612210676
2013	8.526735404479307
2014	11.825462673935727
2015	4.216003832703566
2016	5.757492231329706
2017	5.206347785737269
2018	4.207045697140529
2019	7.515901835557721
2020	22.020157781585656
2021	15.395274253475415
2022	6.575118685965781