Year	annual %
1961	1.9421334523846947
1962	1.9301811073921027
1963	1.917327884133614
1964	1.9312248441852469
1965	1.9680000314700945
1966	1.944417508493888
1967	1.9214572081482022
1968	1.9089833108030485
1969	1.8884529781035022
1970	1.8801472109751916
1971	1.8403989729568895
1972	1.8170585007406772
1973	1.8422489263727766
1974	1.7391799430662522
1975	1.8269721987495189
1976	2.1281321381516043
1977	2.2966648856808445
1978	6.774224593527878
1979	12.060619208454714
1980	8.211441276815354
1981	0.3693964771532244
1982	-0.07171388753973884
1983	2.794363721648935
1984	3.2575608738059953
1985	3.660566043967426
1986	3.7358315744878077
1987	3.1356479325631987
1988	-0.4460024132680574
1989	-2.2463507865789487
1990	-1.0077211752673705
1991	-4.377827333169791
1992	-5.133283234740366
1993	2.4452736161054793
1994	4.479806442469942
1995	3.0236186538915395
1996	3.0361534311364853
1997	2.912273572071346
1998	3.5478659470291642
1999	3.4405271901285164
2000	3.389243029720161
2001	3.370907395342148
2002	3.1200770698590836
2003	2.4553974868728097
2004	2.4186294469438945
2005	2.1830607652658194
2006	1.7432666949576454
2007	7.23885232502527
2008	0.4164345973487337
2009	-0.12560698421002323
2010	-0.20928976291031912
2011	-1.2551289554455292
2012	0.8625508286991571
2013	2.2982866051017745
2014	2.516433297318253
2015	2.3668178802097906
2016	2.75977655777383
2017	2.8910948939151973
2018	2.564581804106908
2019	2.5680751277706406
2020	2.334201280687751
2021	2.0447406299130484
2022	1.9499288018646712
2023	1.916918894996638