Year	annual %
1961	4.696076403617113
1962	4.701320162072676
1963	4.7303475867090725
1964	4.741398595556717
1965	4.810277885750963
1966	4.676005949003198
1967	4.461040243765169
1968	4.483631232305086
1969	4.4507817616531185
1970	4.415614811328837
1971	4.291216369962612
1972	4.273262845914942
1973	4.268654815835333
1974	4.231877970049936
1975	4.369358420378376
1976	4.797685929434664
1977	4.590207687198358
1978	3.823434376427855
1979	3.8572530883818956
1980	4.292460252023275
1981	4.67467564012216
1982	4.610236981216403
1983	4.287157047955972
1984	4.3248885238284345
1985	4.168244850727021
1986	4.119721397953626
1987	3.9091410773993687
1988	3.5680165575878107
1989	3.4565318078576297
1990	4.729407546256041
1991	3.4743962406877102
1992	3.3093153559995585
1993	3.0179675593539486
1994	2.891436721946789
1995	2.8198983573296488
1996	2.6913648317762267
1997	2.6736072562426187
1998	2.680832142221206
1999	2.6626490161496292
2000	2.6676254108149067
2001	2.6570718992705764
2002	2.448542126406352
2003	2.4072705218259642
2004	2.581119695605196
2005	2.653799964616539
2006	2.6115258513005273
2007	2.5104310865869763
2008	2.504084502777232
2009	2.5384386693190635
2010	2.563232670065247
2011	2.263423129365563
2012	2.2300859476927997
2013	2.5418904427378948
2014	2.7010281574718817
2015	2.6830841512928316
2016	2.3886285934501217
2017	2.21053051536731
2018	2.2331265603551884
2019	2.2203839580392923
2020	2.113355425889992
2021	2.023894553004908
2022	2.002057235468911
2023	2.0231329624290026