Year	annual %
1961	2.33763348695733
1962	2.415003542415505
1963	2.4620218353186516
1964	2.503468514679625
1965	2.536066100946613
1966	2.543439478268809
1967	2.5525593451738473
1968	2.5846165968359998
1969	2.6117169957311432
1970	2.644812315090789
1971	2.670982966714817
1972	2.6690278388141735
1973	2.7337845608265354
1974	2.8430452937343205
1975	2.8988472709592656
1976	2.886763262853023
1977	2.9226544203098968
1978	3.100771457177018
1979	3.1529218663791028
1980	2.8567018829042325
1981	2.418653682185166
1982	2.515412637697324
1983	2.761745282333976
1984	2.8309633973000246
1985	2.8344486512519467
1986	2.736968967510805
1987	2.694112580689435
1988	2.583908344523337
1989	2.644995515481696
1990	2.560145934771427
1991	2.4497743807328902
1992	2.827492293873931
1993	3.148205832946587
1994	3.323080686125124
1995	3.135847106832543
1996	2.6719054024038513
1997	2.626329298824672
1998	2.7624198702441447
1999	2.847956371080002
2000	2.8203467600526295
2001	2.828731631603091
2002	3.0398927345097064
2003	3.080730902282852
2004	2.962722463969399
2005	2.9775017724681447
2006	2.907419355075419
2007	2.7639870138662417
2008	2.904089397778236
2009	3.029827123218084
2010	2.9805644168721273
2011	3.00072062916756
2012	3.0333675021430224
2013	3.0222479016218244
2014	2.959364625269288
2015	2.8770383782028404
2016	2.8573845508999227
2017	2.8489819426370957
2018	2.8123171029681373
2019	2.7951689526275487
2020	2.7895667311398427
2021	2.7260088070449626
2022	2.6674794364347036
2023	2.6683743801202127