Year	annual %
1961	2.5532523135899
1962	2.1621816976359858
1963	2.158891652524169
1964	1.9840527879083831
1965	1.7275923632559076
1966	1.7432726569136445
1967	1.8800965187047787
1968	1.763403151411791
1969	1.2250488120864609
1970	0.8786781052554326
1971	1.4036444962107495
1972	1.8932306923110753
1973	1.8312171932612893
1974	1.7576396953689746
1975	1.6481761769187326
1976	1.4783094926645277
1977	1.422765952716015
1978	1.4029867972655141
1979	1.3436008415574308
1980	1.3720902916211242
1981	1.5370656767262072
1982	1.7186280190728094
1983	1.719485027045375
1984	1.6240569165339442
1985	1.4686205218701833
1986	1.3210389940438552
1987	1.224755569479752
1988	1.2038200525491918
1989	1.2430151513864314
1990	1.2987819794263045
1991	1.1441077047572508
1992	0.9182268490772373
1993	0.8339291254779909
1994	0.7774302615332618
1995	0.7218975825502335
1996	0.6486598867331237
1997	0.5961057468241434
1998	0.5608739746522331
1999	0.524180976119623
2000	0.4964153011163365
2001	0.45252798450547266
2002	0.40614695853534477
2003	0.4019738903549264
2004	0.4523715607779706
2005	0.5027936406284335
2006	0.5428672778818722
2007	0.5830735506616441
2008	0.6229246376073493
2009	0.6342013390992738
2010	0.8653858999230027
2011	1.1096746918039648
2012	1.100086715735271
2013	0.7949133668869377
2014	0.4722815898878175
2015	0.3880597113386705
2016	0.34608656772384194
2017	0.29328796080298314
2018	0.19942296826627376
2019	0.1851016152668161
2020	0.2267038420042074
2021	0.2996331896296475
2022	0.3711932688627349
2023	0.6128401502377251