Year	annual %
1961	2.1582263991209487
1962	2.1672203107925725
1963	2.1567015126308746
1964	2.1303547770664863
1965	2.072808992538853
1966	1.913707613229974
1967	1.8683575105093269
1968	1.8195484426614712
1969	1.7751465659919603
1970	1.7263111399676347
1971	1.8014071907771978
1972	1.6115957438094313
1973	1.5564008197365098
1974	1.5232304840032924
1975	1.4690332343210315
1976	1.3455548119288636
1977	1.3213300028274801
1978	1.3231781830252345
1979	1.3152681193996614
1980	1.258891238423331
1981	1.263418816367647
1982	1.15804720155937
1983	1.0769813814910805
1984	1.0389638528601353
1985	1.0327384557435693
1986	1.071878689138316
1987	1.1091587069691258
1988	1.0994537861007956
1989	1.0524873539681465
1990	0.9422438043597907
1991	1.0786711638467636
1992	1.048266626725237
1993	0.9610712368237415
1994	0.9104997187968138
1995	0.8754485254150808
1996	0.8530995299370829
1997	0.821514869699385
1998	0.8002756242988056
1999	0.7716057297106005
2000	0.741563893895659
2001	0.8729472862159611
2002	0.9359772755925775
2003	0.9197344728004282
2004	0.9272931073906392
2005	0.940782068213025
2006	1.0031643953337266
2007	1.0619552879697522
2008	1.08564655746666
2009	0.9953267788553006
2010	0.8817068057339128
2011	0.6292679869375206
2012	0.7251719835322774
2013	0.7391912542212111
2014	0.7433368849221864
2015	0.7397094594177673
2016	0.7510748122381443
2017	0.692226323128267
2018	0.666721707103406
2019	0.6170108623409192
2020	0.5795593380785391
2021	0.16000696598719344
2022	0.4758598649564476
2023	0.7633712107560058