Year	annual %
1961	4.231951028578148
1962	4.2714910027699595
1963	4.40961718093479
1964	4.533745693121776
1965	4.631121999124414
1966	4.727599512190667
1967	4.846309134249399
1968	4.920667965422241
1969	4.981254751726613
1970	4.896587794017975
1971	4.132559570729944
1972	4.183789757178819
1973	4.1712111513790315
1974	4.185003493515419
1975	4.245769679457104
1976	4.010284038125209
1977	3.8230886037205916
1978	2.866062296627192
1979	2.7689197630578257
1980	3.086261165485207
1981	2.307591125712664
1982	2.8237003364444933
1983	3.6757268413038133
1984	3.729828006808293
1985	3.8701320686501686
1986	4.085224432117072
1987	4.2225289418060346
1988	4.542278614877158
1989	7.372110669950134
1990	7.042600103359724
1991	4.294053675056675
1992	4.685256635021628
1993	4.944712116743539
1994	4.865238980302667
1995	4.64741496408929
1996	4.419200879941162
1997	4.241533819455095
1998	4.1386225970638275
1999	4.042122373169142
2000	3.897629182769945
2001	3.6361882915071377
2002	4.319807034976941
2003	4.168882619523379
2004	3.964149881402488
2005	3.8747469815593414
2006	3.834512088057571
2007	3.8404761658873374
2008	3.8914963973879244
2009	3.9343160489763913
2010	3.973955524075505
2011	3.98673167641516
2012	4.0806243697219315
2013	4.098142715159562
2014	4.093639531419654
2015	4.071154729879532
2016	4.002106709413329
2017	3.9104110531053733
2018	3.7992166275870716
2019	3.687052828946881
2020	3.6432160344209694
2021	3.4867329535963547
2022	3.224590171011591
2023	3.1461710463109283