Year	annual %
1961	4.996110036106842
1962	5.010592113387858
1963	5.017120267049037
1964	4.96392807149779
1965	4.895773491998369
1966	4.689180889641719
1967	4.044944659925704
1968	3.9016962178973813
1969	3.9318094619210626
1970	3.7883877318895003
1971	3.483479826835392
1972	3.2792063020214073
1973	3.1400097141520718
1974	2.768839006183015
1975	2.68688548702805
1976	2.839977853130989
1977	2.73637237806723
1978	2.7534369076825698
1979	2.835952684221482
1980	2.8919675791707107
1981	2.9941297216413716
1982	2.996493613533829
1983	3.013527076758919
1984	3.0502322784796263
1985	3.011266963797084
1986	2.8798290004630616
1987	3.2989400713316854
1988	3.15935054552385
1989	2.938708552141577
1990	2.7733001172332905
1991	2.4895733076676407
1992	2.316061130936234
1993	2.330771348832144
1994	2.2379866425051347
1995	2.0817730324775425
1996	2.3074829672139714
1997	2.202860405135908
1998	2.220676492031288
1999	2.1949174877195645
2000	2.2069301131512447
2001	2.1216419453017608
2002	1.9489982802135302
2003	1.896129147097895
2004	1.913386313489525
2005	1.877331336191034
2006	1.918579443606788
2007	1.927670452164449
2008	1.9480252510717548
2009	1.8966265222199752
2010	1.8424950378681046
2011	1.7864334686013876
2012	1.736453372947011
2013	1.7196656193104758
2014	1.7069154222737524
2015	1.678268793411803
2016	1.6582433798370886
2017	1.627684893135978
2018	1.5927212606994061
2019	1.5671333561991503
2020	1.7644326718696703
2021	1.9411158002780269
2022	2.0385659850592504
2023	2.153898918212576