Year	annual %
1961	15.08097688211209
1962	15.059319955641362
1963	14.988377127152381
1964	14.889190045607146
1965	14.807310937522209
1966	13.577951196922491
1967	8.410831609531218
1968	8.59262215152902
1969	8.525579302595517
1970	8.441751824693482
1971	8.379967797010668
1972	8.165531233081996
1973	7.887211539127397
1974	7.882196029325265
1975	7.824804455774122
1976	6.809135214546684
1977	3.5010793408418186
1978	3.3236532677564252
1979	3.3123382809149073
1980	3.3166289132668605
1981	3.3128401324809706
1982	3.3065302865158617
1983	3.295127993821538
1984	3.2906358818744743
1985	3.2431805435589656
1986	3.9242171090562987
1987	6.356447936663928
1988	6.036813726822284
1989	5.887128483575294
1990	5.7473573662068445
1991	5.613042204635458
1992	5.480778498175976
1993	5.3169209664064745
1994	5.173598660500138
1995	5.042328249213746
1996	4.649561936630085
1997	3.574336161923232
1998	3.3331401351457997
1999	3.093744398535355
2000	2.8632874733390814
2001	2.662527247698044
2002	2.5098959113516472
2003	2.362307956208313
2004	2.193597113442729
2005	2.1474186794158556
2006	2.5014266351304135
2007	2.4364851188866874
2008	2.669853477194851
2009	2.773902147583696
2010	2.7311314285223527
2011	2.779002371123119
2012	2.3775860568510443
2013	2.463788665357736
2014	2.5465538052492356
2015	2.6253292814794325
2016	2.698109664898295
2017	2.7402573834850683
2018	2.7683791641986684
2019	2.7744653251344498
2020	2.8056828311809774
2021	2.7514127344004105
2022	2.6208281233941513
2023	2.620649273839548