Year	annual %
1961	2.3514851485148514
1962	12.333736396614269
1963	34.33799784714747
1964	-7.732371794871796
1965	-8.076422058184976
1966	7.8885214926783185
1967	3.1085814360770576
1968	0.8492569002123143
1969	0.9263157894736843
1970	4.476428869420109
1971	4.624046639779579
1972	19.270256860425174
1973	20.6016
1974	22.213967310549776
1975	18.664785062961357
1976	10.489049892968879
1977	4.321907600596125
1978	15.682539682539682
1979	16.67124039517014
1980	16.982241561801718
1981	20.418216547702826
1982	13.165803973952245
1983	15.603098487642935
1984	17.65156349712827
1985	-1.773703623345628
1986	31.3380087249434
1987	-24.6552304069963
1988	29.927455357142858
1989	32.21663874930207
1990	37.65592515592516
1991	36.89116481026996
1992	34.187660535434155
1993	26.967204395837047
1994	33.201011732584966
1995	38.93476746430441
1996	39.04871357198234
1997	28.07760694488024
1998	33.66595002061521
1999	29.538655528772445
2000	42.440323475750844
2001	43.64109828445956
2002	35.58647715081485
2003	0.7332813076221502
2004	32.09073881848937
2005	27.30854749668686
2006	27.31114361789429
2007	29.9210073504003
2008	14.892204193397394
2009	30.63739217879979
2010	42.499726815695354
2011	30.60134017945636
2012	32.559016931347244
2013	31.4251476008941
2014	20.956889978489023
2015	30.672917389954335
2016	17.448873725492195
2017	20.54242234797438
2018	14.570314266996338
2019	15.544426082997312
2020	18.17737711572925