Year	annual %
1961	4.600421756536736
1962	4.754075462237899
1963	5.7870338752779285
1964	6.476908318598353
1965	6.529748441058128
1966	6.455298284330323
1967	6.352857511897851
1968	6.267456612007309
1969	6.175893595909978
1970	6.079859244659443
1971	5.38365354402833
1972	4.41248049089381
1973	4.340857449375599
1974	4.243444972275357
1975	4.13945533133532
1976	4.051552446351696
1977	3.867690568491006
1978	3.0350546611896108
1979	2.9915741831226397
1980	3.0269966334745053
1981	3.0948706822430925
1982	3.0818531417288684
1983	2.564378675424891
1984	2.1078525725171207
1985	2.2071852159868244
1986	2.248457444657892
1987	2.2103164565755287
1988	2.2645786254765308
1989	1.9946798348299013
1990	1.7462570585583461
1991	1.622868996390004
1992	1.4977869592373543
1993	1.4217053761979948
1994	1.3323062808787944
1995	1.209568378730618
1996	1.1724957425649076
1997	1.4305688797334963
1998	1.454353754528884
1999	1.4681604447847354
2000	1.5087975354603558
2001	1.4863707904858243
2002	1.4487211287861095
2003	2.177384204086754
2004	2.5349223437959405
2005	2.4857434859807506
2006	2.42043280777465
2007	2.1854420607303577
2008	1.838539655324461
2009	1.582045744423111
2010	1.4890774064567782
2011	1.4631988641026124
2012	1.393282635788792
2013	0.7054972389555487
2014	0.7179080143127068
2015	0.7394635524228343
2016	0.6821769654028241
2017	0.7290633685431063
2018	0.8080510353958132
2019	0.808581601812801
2020	0.8582269400898451
2021	0.8440350679474302
2022	0.9036897288348213
2023	1.0323912763006229