Year	annual %
1961	2.511460834971473
1962	2.5492940519092
1963	2.601809541726354
1964	2.6325416444833394
1965	2.6536170090933666
1966	2.6968304803113767
1967	2.7406845801043715
1968	2.736381959970501
1969	2.728846505233747
1970	2.7183850067802524
1971	2.6850697378686164
1972	2.66463155054673
1973	2.680841612688667
1974	2.7136418492678303
1975	2.888083691680592
1976	3.244318517181455
1977	3.1732483553520154
1978	2.7072379499309562
1979	2.7787123195615067
1980	3.08161014292601
1981	3.449040107820238
1982	3.4233808540439696
1983	3.1439013046766036
1984	3.186007819691696
1985	3.104107752030899
1986	3.0575997611810948
1987	2.9775320427789893
1988	2.829914996726842
1989	2.7717287510938178
1990	2.8687941022113677
1991	2.779923530107766
1992	2.4848162133217215
1993	2.1671235644540303
1994	2.068690926407996
1995	2.1191184382609123
1996	2.0311958642819974
1997	2.0073836803863117
1998	2.0018685105871725
1999	1.9788567468729497
2000	1.9848855441555884
2001	1.9821354959011899
2002	1.81203490740576
2003	1.785607267217486
2004	1.9401475799497518
2005	1.9553498537411258
2006	1.927417988150836
2007	1.9102379129553668
2008	1.9075795524080092
2009	1.9236564043708455
2010	1.964416587465621
2011	1.8731953082670572
2012	1.842377642818434
2013	1.9797304445739172
2014	2.0458672847055084
2015	1.9870779153896194
2016	1.8242312089991657
2017	1.698287400858618
2018	1.7186090724526935
2019	1.7185709672459524
2020	1.605884666077145
2021	1.5030697701639468
2022	1.4911528403068246
2023	1.527975131383812