Year	annual %
1961	2.848771031350708
1962	2.8435305216973177
1963	2.8286635414091137
1964	2.807887891415703
1965	2.7785438166316965
1966	2.729521760167586
1967	2.677207090441186
1968	2.6277186760161726
1969	2.580574597430953
1970	2.537985462835195
1971	2.5052285365576097
1972	2.485175641144906
1973	2.471123474399775
1974	2.452137783888759
1975	2.4254079265121504
1976	2.3977570317136525
1977	2.401640817979583
1978	2.409831838446138
1979	2.382908145188651
1980	2.328803376495074
1981	2.23838470659436
1982	2.182881413645049
1983	2.1681856007473357
1984	2.1309147246284255
1985	2.0824993821837694
1986	2.0350806838595616
1987	1.9935898229063582
1988	1.964776219524893
1989	1.93068339668649
1990	1.9249672581757693
1991	1.904091587235186
1992	1.852198405283545
1993	1.8131424378528607
1994	1.7802294626456217
1995	1.740350013365898
1996	1.6882133918485636
1997	1.6457063510844279
1998	1.6048529001278808
1999	1.558633249353008
2000	1.5091726549330673
2001	1.4559199052634426
2002	1.4040565691953333
2003	1.345168103071856
2004	1.3054603966256053
2005	1.2757907938089943
2006	1.2337066463685034
2007	1.195909417607723
2008	1.158174469988623
2009	1.1336964254214763
2010	1.0825425449862536
2011	1.162541625383426
2012	1.147838590653265
2013	1.1123576673908673
2014	1.0868020627881236
2015	1.0658398737581223
2016	1.0457258877262632
2017	1.0145152567657476
2018	0.9651205150997839
2019	0.9092437640734801
2020	0.8201590740805074
2021	0.7100934460741826
2022	0.6903371111786356
2023	0.7577349370541384