Year	annual %
1961	2.624460595126196
1962	4.843711942827947
1963	4.588934455849576
1964	4.370417651108761
1965	4.1644344140276885
1966	3.9916666981840585
1967	3.833361450278664
1968	3.6994559865255057
1969	3.577479796176269
1970	3.4760965957845205
1971	3.3821418664322813
1972	3.2869221680531724
1973	0.989354587500605
1974	1.0172307592018304
1975	1.0743627324378344
1976	1.1078704071238237
1977	1.1192044426716583
1978	0.7985915715664512
1979	1.2297143916514188
1980	1.1724997104931099
1981	0.9683438695293037
1982	0.7060331351325123
1983	0.40299904616843496
1984	1.788725566414734
1985	1.5595421962462348
1986	1.5036702513092768
1987	1.4818439596173478
1988	1.421444751580756
1989	1.491265350026628
1990	1.4347205903269986
1991	0.7988625325492063
1992	1.032155171239475
1993	0.9034020800827338
1994	1.1170672188297115
1995	0.576120623716416
1996	0.7382468256015411
1997	0.9666193627139475
1998	0.7675878543081238
1999	0.9842846949256455
2000	0.6948909988431742
2001	0.5295576331241175
2002	0.4305937450455579
2003	0.4595107621562976
2004	0.3622150353992298
2005	0.3288196257367739
2006	0.20009277380518875
2007	0.1910275488935214
2008	0.09374173588945198
2009	-0.0003847966830509462
2010	-0.028863971998369375
2011	-0.1074471773328409
2012	0.00674291296022855
2013	-0.024276614803111253
2014	-0.08867897829200207
2015	-0.1379942801787297
2016	-0.15095013491741407
2017	-0.07875455978932676
2018	-0.06293211575369163
2019	-0.034096699343667006
2020	-0.012401682769220513
2021	0.06218670741633588
2022	-0.21559086428429744
2023	0.02212333574587235