Year	annual %
1971	8.58357203748055
1972	4.8260107564843935
1973	3.434735414266669
1974	0.9869390540281557
1975	9.474608489308011
1976	5.426181292795064
1977	8.706755060935919
1978	6.600946955552061
1979	1.1016748444267392
1980	-4.870460274740935
1981	19.68619123224255
1982	8.91094094414288
1983	5.4540763439985085
1984	7.991051750552387
1985	1.3923866365639412
1986	0.19836358296578283
1987	-2.4333060874905783
1988	3.9921915060408253
1989	0.8199603931632282
1990	-3.5856533488983047
1991	-10.437530622735608
1992	-11.109406296341291
1993	-15.019755147679021
1994	0.2612308370170382
1995	2.31114365836018
1996	8.103087523381063
1997	2.8613405040087088
1998	0.35493332128390875
1999	6.1203172240455075
2000	5.732587835756831
2001	3.6330254771434767
2002	1.186803607099577
2003	4.02513545527998
2004	5.614980066633237
2005	11.4773113302481
2006	12.391567713360146
2007	6.775750366471797
2008	4.147401679921757
2009	0.5536483231971374
2010	2.6771110151056803
2011	3.544998583542153
2012	3.1717718375421384
2013	2.9171064590187683
2014	0.9166584188489821
2015	4.460502098478088
2016	0.34994456522004214
2017	1.8182511852933771
2018	2.18032309819624
2019	-0.19249011119747195