Year	annual %
1961	4.405489575634874
1962	4.5210396312384376
1963	4.653809284393645
1964	4.764304178820808
1965	4.820568477816849
1966	4.838067782415138
1967	4.8493511080991
1968	4.900811857743605
1969	4.937732481858674
1970	4.807084380179049
1971	4.810826268403147
1972	4.8575600385045306
1973	4.834362276935096
1974	4.74258556357303
1975	4.7405650868022065
1976	4.701517096999552
1977	4.656332074880936
1978	4.852288141119047
1979	4.876979115678083
1980	4.5738307844121096
1981	4.4465460497321345
1982	4.492222629105896
1983	4.655628834899986
1984	4.854643869668379
1985	5.070151859642664
1986	5.3107259283905535
1987	5.340276157878421
1988	5.154641855600943
1989	5.011675145571786
1990	5.078849582546937
1991	4.5965744049912445
1992	4.349481474688048
1993	4.374956368016129
1994	4.318885221173005
1995	4.09929721395919
1996	3.7810979123859454
1997	3.6430474740550807
1998	3.588252352955166
1999	3.601473617773209
2000	3.6022623397876146
2001	3.6553773921347528
2002	3.716957913480499
2003	3.7080821399724186
2004	3.7362049673779723
2005	3.814603563078407
2006	3.8063574591385105
2007	3.6136081397107205
2008	4.1227757967293
2009	4.11393727635938
2010	4.129107028838263
2011	4.131388528841185
2012	4.072096166607153
2013	4.135673150031778
2014	4.189535635224601
2015	4.282729397361493
2016	4.128188657506797
2017	4.021131501239083
2018	4.107632611124615
2019	4.090983085533068
2020	4.06858924235209
2021	3.987698241948138
2022	3.921473150429094
2023	3.9145154920189498