Year	annual %
1961	0.8953032021556012
1962	0.9527176707364899
1963	0.9856155876482328
1964	1.014505667206255
1965	1.035449584296116
1966	1.0435705714640455
1967	1.0367211773396567
1968	1.0257999259965542
1969	1.0140608664900324
1970	0.9889938838466881
1971	0.9708948383046608
1972	0.955834459770308
1973	0.9357125272082959
1974	0.902379813516408
1975	0.8829787017000006
1976	0.8711929331113928
1977	0.8676167284143739
1978	0.8420953259669872
1979	1.069814551253604
1980	1.7759391622793386
1981	1.8408881904004428
1982	1.8701328480553923
1983	1.8731147247898638
1984	1.8729291756730808
1985	1.882905096458426
1986	1.8919408838298482
1987	1.9041009580847508
1988	1.9041679636551128
1989	1.9003784992488264
1990	1.894793940583055
1991	1.8922995985708162
1992	2.1650451298988953
1993	3.968133244926395
1994	3.247823152006884
1995	1.5666013516461341
1996	2.0728848884553788
1997	2.4094758366530398
1998	2.5374242171084944
1999	2.548778938257446
2000	2.5241098261344708
2001	2.4970468078661106
2002	2.370216076654489
2003	2.190754577514982
2004	2.1910772810861787
2005	2.3332381151130512
2006	2.2051474035508387
2007	2.0083695949023315
2008	2.0695442543289304
2009	2.0573566016608216
2010	2.0374825491404023
2011	2.019005671017846
2012	1.993989315355083
2013	1.9703394603536668
2014	1.9751578388083022
2015	1.9818311981612737
2016	1.9616183340716349
2017	1.9388632584870769
2018	1.895198319724964
2019	1.839631665207673
2020	1.7609021697184666
2021	1.6740684086354307
2022	1.5945636806233003
2023	1.5322038217705007