Year	%
1961	2.206876308246451
1962	5.579788729769517
1963	3.2761668651329576
1964	1.7279375229593479
1965	2.265164054812211
1966	2.6207658722593496
1967	0.48366043712189677
1968	3.257356442273124
1969	1.0709088311784938
1970	1.6870626384900163
1971	1.961979577314894
1972	0.7832884968797197
1973	-1.503514177732883
1974	-6.019131824538135
1975	-5.338237024579568
1976	-3.598526355484449
1977	-1.3845682963964845
1978	1.0509097312130649
1979	0.45231913158385234
1980	-0.03415546952226798
1981	2.107507976573515
1982	1.416795281228061
1983	2.0500102361012433
1984	3.372151319732442
1985	7.390258658719111
1986	7.932094096491171
1987	7.527278694024499
1988	6.44108972053912
1989	6.619263857686919
1990	9.67270856641165
1991	10.092869400024828
1992	8.97038290484152
1993	8.473781143033932
1994	7.98605796893548
1995	8.022844372111335
1996	6.83251279377306
1997	5.819743005613423
1998	5.485434279156091
1999	6.062444730023366
2000	5.0374239651348836
2001	2.1130968649957165
2002	3.4249150091202454
2003	3.521734658530996
2004	3.6982016055137383
2005	3.3063398726425786
2006	2.375590567467343
2007	3.0574114756760915
2008	4.148913128692017
2009	1.0211349652366548
2010	6.057533613834459
2011	1.4457354548946135
2012	5.078166698560921
2013	6.353353796367187
2014	4.482137658988229
2015	6.236771423331203
2016	6.116716941461306
2017	1.5381073123631666
2018	3.3196529130074617
2019	1.5824650618413718