Year	annual %
1961	20.274914089347078
1962	17.42857142857143
1963	17.810218978102192
1964	27.98430400660884
1965	50.94400516378893
1966	28.16976694462262
1967	24.46409208441071
1968	26.598311218335347
1969	32.0205388809486
1970	18.84923817161187
1971	45.35946830403832
1972	20.252518219375204
1973	29.85215780128156
1974	56.45446573224929
1975	4.854599519290145
1976	29.856574643701695
1977	25.495381094582903
1978	14.867817529814026
1979	35.86954943443349
1980	26.63189843115462
1981	15.738615265165581
1982	-7.8913915848166
1983	-5.027760478789094
1984	0.1731021969808532
1985	27.047147778523602
1986	-6.396630847222283
1987	2.998794138158647
1988	-4.620286415637823
1989	11.28515906009834
1990	18.98246158250899
1991	-1.087751516986973
1992	16.49380160232908
1993	5.94488188976378
1994	14.000702091439333
1995	9.557130580318319
1996	1.0266723116003387
1997	-3.704091729235784
1998	3.8054712715931487
1999	7.401800374981077
2000	3.1053812874754683
2001	4.315865854812758
2002	6.106154544079843
2003	6.500589062440619
2004	13.76969329312898
2005	29.005951587482066
2006	14.078531485533674
2007	38.04307285727987
2008	49.19214765981427
2009	17.41287868988177
2010	-0.5733348610511285
2011	24.00042816809017
2012	12.582639845252514
2013	6.294448959894339
2014	-0.3387012639388203
2015	12.507044918415398
2016	22.07368060726097
2017	24.747973050113146
2018	-0.6287157264548598
2019	-1.8537374016916488
2020	15.180200941761763
2021	-20.26376795954747