Year	annual %
1968	21.08644750199133
1969	3.5893560890203275
1970	6.029744681683226
1971	6.695440088888162
1972	6.472314206986084
1973	3.9572327704817667
1974	4.818047313631695
1975	22.989138253001755
1976	10.946337651733344
1977	8.063946429240005
1978	8.562151174611628
1979	11.421245087751515
1980	14.501653026749153
1981	10.808507350147778
1982	13.15369968869517
1983	10.817400274057889
1984	9.25199784980748
1985	-3.4824903286303055
1986	-0.13830009711506364
1987	-1.9065324223787172
1988	-4.252931554791658
1989	3.415378475609714
1990	7.602112651421194
1991	-5.8160572986416526
1992	0.7388168240285466
1993	3.2350941551597288
1994	39.562351908417156
1995	15.808983897355347
1996	-1.6521191963627615
1997	5.580197829968043
1998	1.7395750287744391
1999	16.286045581710695
2000	-0.6197279203850172
2001	4.678362082736513
2002	3.5128817229089577
2003	-7.59428426979656
2004	3.598624143523182
2005	7.501710130842014
2006	4.6468733608865165
2007	4.5550460766963425
2008	7.276367641784631
2009	4.635932162051205
2010	4.364999735052294
2011	12.182890128791769
2012	4.605407627625354
2013	0.6526318024478712
2014	1.2686434400342108
2015	2.883509375061294
2016	1.3511223137048063
2017	1.934273211187218
2018	1.4579639111606042
2019	1.9305420689580615
2020	0.5323401815096673
2021	3.3589739985495015
2022	5.727834459780141
2023	2.858867776173213