Year	annual %
1961	2.3626673332691155
1962	2.421689837333531
1963	2.416031996091334
1964	2.452027231386978
1965	2.4737380285974524
1966	2.4296818773883047
1967	2.4386399306239355
1968	2.4804263194784397
1969	2.4838325523760147
1970	2.5168080545724365
1971	2.5112318576897508
1972	2.438459449293944
1973	2.4738382096911806
1974	2.5859789384984566
1975	2.5732424767427062
1976	2.5582831475838788
1977	2.4541366437880185
1978	2.5568484511323106
1979	2.7031528952668396
1980	2.549254036772439
1981	2.6405402181992628
1982	2.765232856774503
1983	2.5643167367178705
1984	2.405487868550324
1985	2.371363345406891
1986	2.3523325557746944
1987	2.37683563506954
1988	2.2263608599400158
1989	2.154113557759942
1990	2.2005719098591783
1991	2.1845001586050756
1992	2.041899500791189
1993	2.053138565027595
1994	2.007105936775048
1995	2.0840143194056964
1996	2.2838096608939935
1997	2.174775496088486
1998	2.0989828399901285
1999	2.150414970258325
2000	2.1777326069115475
2001	2.1595773464425037
2002	2.1514922559199476
2003	2.1640246079097665
2004	2.183983062476983
2005	2.1737548102447732
2006	2.221527237438096
2007	2.36368010969683
2008	2.158024859022788
2009	2.1357023515975726
2010	2.1198336141226406
2011	2.0770827097656763
2012	2.0957742168060065
2013	2.1113662442950414
2014	2.0631604242845327
2015	2.042227561904724
2016	1.9931637357125283
2017	1.9238199038448869
2018	1.912030756887333
2019	1.908915618160421
2020	1.8846058546990037
2021	1.802817030148347
2022	1.7233271049711334
2023	1.6902576741349264