Year	annual %
1961	5.653382832424578
1962	7.081499409749881
1963	7.088562032000796
1964	7.059328552174557
1965	7.052338568731127
1966	7.011662729829133
1967	7.03709767576184
1968	7.017110154491791
1969	6.895236938724637
1970	6.501174522255326
1971	5.20399854395982
1972	5.379633050403882
1973	6.5188985658703045
1974	7.973992576702151
1975	10.87943763035991
1976	10.65252361819257
1977	10.600269562549228
1978	10.605493772068774
1979	10.495063977570073
1980	10.498013586872624
1981	8.817186284486379
1982	5.315997395347156
1983	5.324820826001385
1984	5.243655883045896
1985	5.083024132087538
1986	4.893082457964806
1987	4.731451937332783
1988	4.65539513301814
1989	4.591186309026437
1990	4.583963888899985
1991	4.162852569267956
1992	3.5681298941755535
1993	3.6233922231001774
1994	3.6296649763317257
1995	3.5635823157969835
1996	3.449107980942913
1997	3.468605378431965
1998	3.5555154513716407
1999	3.583953432873768
2000	3.5639666321410335
2001	4.0215485262066375
2002	4.560228225960112
2003	4.428774162403604
2004	4.319324358554943
2005	4.14458215704186
2006	3.817223870193573
2007	3.634036977038244
2008	3.4436910718805196
2009	3.405919775717228
2010	3.644549781215739
2011	3.692842583391135
2012	3.673378508357885
2013	3.6423755402030458
2014	3.577997448042089
2015	3.4699490189497864
2016	3.464608061794551
2017	3.4347258719703295
2018	3.296925085757067
2019	3.2013945716686725
2020	3.18709422690114
2021	3.143603061184201
2022	3.020051347031416
2023	2.9281517047064933