Year	annual %
1961	4.993707985185878
1962	5.011294745012634
1963	5.0923857744662655
1964	5.148333249697927
1965	5.228207451488203
1966	5.100091891169825
1967	4.811471557073929
1968	4.849924378235855
1969	4.85066982505748
1970	4.813094074973719
1971	4.6986963727817965
1972	4.722124221783133
1973	4.71042464317955
1974	4.592599467569954
1975	4.696724621923437
1976	5.168910630391849
1977	5.020249435325198
1978	4.285723475765167
1979	4.384637841121247
1980	4.719110813814979
1981	4.504312628770776
1982	4.388937414132997
1983	4.507986879777917
1984	4.582657214017473
1985	4.398157545216037
1986	4.379930586372211
1987	4.182628676764537
1988	3.783836240103966
1989	3.642741947733839
1990	4.14820735894277
1991	2.984539552578809
1992	3.6083801973701384
1993	3.5402651415413544
1994	3.2513306462827387
1995	2.875575993442837
1996	2.7860007739941324
1997	2.8094879261856676
1998	2.799354416677531
1999	2.770314967612464
2000	2.761375145751387
2001	2.7385688649025752
2002	2.704920647746718
2003	2.687773109216778
2004	2.6814873051118866
2005	2.975946028637594
2006	3.292407977463256
2007	3.2100599536657484
2008	3.525021784366757
2009	3.4404410585091796
2010	3.1396952697622282
2011	2.640995252169347
2012	2.56523641606816
2013	2.8642708784520465
2014	2.8481339613912127
2015	2.757975359736747
2016	2.598836894233031
2017	2.504305121748601
2018	2.5479578979149267
2019	2.5052707476431806
2020	2.110092531899639
2021	1.9798095832476008
2022	2.2391016011106046
2023	2.310167369226562