Year	annual %
1961	5.427895721709344
1962	7.8749382782090285
1963	7.671196183866742
1964	7.524061296836554
1965	7.413253125643172
1966	7.436335107358004
1967	7.5225139404887145
1968	7.6246028592947255
1969	7.656849868271742
1970	7.760401449061112
1971	4.395232419124189
1972	3.183227192208381
1973	3.1634843873564904
1974	3.2184911889699768
1975	3.3203804635750225
1976	3.4907621223395755
1977	3.6299223658378503
1978	3.7106582271106614
1979	3.63829493352497
1980	3.4030812104900083
1981	3.1095603196878816
1982	4.581309222538412
1983	4.690530284023716
1984	4.736981412099843
1985	4.895658582682108
1986	5.038195056104394
1987	5.195647488951054
1988	5.317428559722769
1989	5.219290649711737
1990	5.076538452265932
1991	4.842112484170102
1992	4.207128185310903
1993	4.057292868975576
1994	3.944034813623699
1995	3.819091151991855
1996	3.696457117317499
1997	3.556053754563087
1998	3.417264615664154
1999	3.276115016971111
2000	3.1435317585098286
2001	3.522874197822084
2002	4.562917142967611
2003	4.740257258557837
2004	4.62856461268554
2005	4.531505774968504
2006	4.4510848135384045
2007	4.379162391774856
2008	4.287140086594745
2009	4.149585467541572
2010	3.9791618764406658
2011	3.8195431013318535
2012	3.709585647388235
2013	3.5466211986860916
2014	3.374667454666254
2015	3.198619882287115
2016	3.0286948659126662
2017	2.874220536463047
2018	2.7315390698494717
2019	2.6145950989655646
2020	2.8874830209952997
2021	2.9845183569432927
2022	2.8016961509764426
2023	2.798185952459744