Year	annual %
1961	1.8870907128584
1962	2.03819990200126
1963	2.18351749145652
1964	2.31550617255799
1965	2.43607717525374
1966	2.54098408314936
1967	2.66778792625351
1968	2.75565466046345
1969	2.83058914324168
1970	2.90281974909526
1971	2.94223756636724
1972	2.99400217719842
1973	2.99100503428902
1974	3.00594151221225
1975	3.0675443304544
1976	2.84182748542272
1977	2.65548175657098
1978	1.70377521121895
1979	1.61226474644176
1980	1.930410097462
1981	1.16127103883721
1982	1.81909503749973
1983	2.70446507258018
1984	2.75997433504885
1985	2.90614919793084
1986	3.12256945652249
1987	3.26537163746685
1988	3.58337624484119
1989	6.42210939531102
1990	6.09436073046608
1991	3.34768971230455
1992	3.20257696605466
1993	3.24084628891261
1994	3.16913849081237
1995	2.96631636921689
1996	2.74610275033798
1997	2.58297473472435
1998	2.49115076791854
1999	2.40883758441721
2000	2.27194936669291
2001	2.02757940882814
2002	1.71558953640231
2003	1.41434290218581
2004	1.24422104996521
2005	1.20234000182313
2006	1.19983522844956
2007	1.2473242341721
2008	1.33630166361813
2009	1.4303035696071
2010	1.5047354003649
2011	1.56298266563295
2012	1.63406204857906
2013	1.69446732352455
2014	1.73094393878771
2015	1.75460038083267
2016	1.76502653275581
2017	1.75699918544662
2018	1.72516455160384
2019	1.68846817343864
2020	1.72031062423917
2021	1.63585889002733
2022	1.44635918427576
2023	1.4372197796667