Year	annual %
1961	2.406311301365477
1962	2.3807940874199858
1963	2.356275577501947
1964	2.2914595977752867
1965	2.244262716605789
1966	2.105907003429806
1967	1.9852418801874308
1968	1.84101494899285
1969	1.779134670842211
1970	1.733282441675584
1971	1.6616296814615055
1972	1.5974524081218533
1973	1.5551754684078816
1974	1.654685257600292
1975	1.717552102390414
1976	1.7760922574771456
1977	1.9117046032712608
1978	1.9612677497237883
1979	2.033510225746028
1980	2.0456909996676274
1981	1.9979358613731364
1982	1.9507697075168267
1983	1.904731897448059
1984	1.8940468655652296
1985	1.8745470707301592
1986	1.7653273621798888
1987	1.3471482965017572
1988	1.1594444180183672
1989	1.0371656626961396
1990	0.9883735425375306
1991	0.8188067147088134
1992	0.7623662084034919
1993	0.8379284115569874
1994	0.7958599537120676
1995	0.7552258504659193
1996	0.7930707166587467
1997	1.1418696526361884
1998	1.223874435898864
1999	1.184623958164849
2000	1.0745430124022448
2001	1.0221955393059545
2002	1.0204588874668445
2003	0.9815809438893979
2004	0.9294196709102209
2005	0.8952795334515713
2006	0.8509106543812948
2007	0.8043561857455188
2008	0.6879211251219743
2009	0.6365427002723294
2010	0.685624827536472
2011	0.7376966209734945
2012	0.7358490050145718
2013	0.7388880105258835
2014	0.7389919102243709
2015	0.7254802712828052
2016	0.7334651698640187
2017	0.7343191912801785
2018	0.7027331491564581
2019	0.6904884869863395
2020	0.861304770273577
2021	1.015464484649371
2022	1.0126652815762895
2023	1.0171822684556133