Year	annual %
1961	-0.6322950999083616
1962	0.7488450402263425
1963	1.9834681933606646
1964	1.8634928101349573
1965	2.57004644648147
1966	2.815408983689906
1967	2.617234591489307
1968	2.6482118277904476
1969	2.745158825490847
1970	2.744990328345409
1971	2.690364797382557
1972	2.4417960242243595
1973	2.189322040014474
1974	1.9097495566430922
1975	1.8495668932158225
1976	1.5322330412403744
1977	1.4051620652247436
1978	1.104255551918726
1979	0.7806976677295836
1980	0.6722418850010996
1981	0.6553851159491586
1982	0.7719469104192456
1983	0.8709210614450882
1984	0.7365343396154032
1985	0.7350649605670156
1986	0.7876995005802883
1987	0.8346154337729672
1988	0.8003180076503895
1989	0.7072189929014314
1990	0.6239772787156141
1991	0.4383272094906374
1992	0.28680479596756925
1993	0.1951271826781067
1994	0.12651274019317782
1995	0.04217136491307372
1996	-0.03272153957611579
1997	-0.08888478184138648
1998	-0.1848149345060648
1999	-0.3080639104058207
2000	-0.4456657013712828
2001	-0.7075309198821884
2002	-0.9114128087127256
2003	-1.004618524713365
2004	-1.0892424666076579
2005	-1.143930845600451
2006	-1.1604121947560913
2007	-1.2001102990652868
2008	-1.2600745710512626
2009	-1.314702480040765
2010	-1.3683733558361695
2011	-1.246204113403877
2012	-1.1479218420774515
2013	-1.1935940831775298
2014	-1.2670999754788426
2015	-1.3402290246262538
2016	-1.3837382373222056
2017	-1.4008738147638127
2018	-1.500222085289451
2019	-1.5698655494001201
2020	-1.6409302567136024
2021	-1.7484691939263683
2022	-1.8104998825952237
2023	-1.8232587725149187