Year	annual %
1961	2.17386810638959
1962	2.2728918533378
1963	2.318877937557
1964	2.42704511869551
1965	2.41819321989917
1966	2.44025243751488
1967	2.65474678477131
1968	2.75613980522855
1969	2.69680372313037
1970	2.55014179388971
1971	2.00917428416867
1972	1.64096791210891
1973	1.71339519301278
1974	1.72429587876977
1975	1.71678036223655
1976	1.66218355569908
1977	1.63920737643257
1978	1.67476002377471
1979	1.68374146280831
1980	1.5599179649036
1981	1.36251089910957
1982	1.34419580522923
1983	1.41468036490133
1984	1.39116107330013
1985	1.37207302387443
1986	1.38664538284893
1987	1.40036291435214
1988	1.44903951995967
1989	1.4671405771336
1990	1.42854570393901
1991	1.39128476210504
1992	1.40600454010142
1993	1.44650383461611
1994	1.43901654513085
1995	1.44450397956995
1996	1.4367001101544
1997	1.37229402493903
1998	1.3133397029292
1999	1.31164599373427
2000	1.25228247927372
2001	1.05419487775652
2002	0.945302183064675
2003	0.907042396715275
2004	0.878482955573281
2005	0.879502933541775
2006	0.823120977302667
2007	0.745302497633524
2008	0.711545007164178
2009	0.771009503458442
2010	0.701110398374398
2011	0.729393790471232
2012	0.869403225669288
2013	0.821163785495365
2014	0.784827172615701
2015	0.695762433860479
2016	0.677661202777028
2017	0.741744903878247
2018	0.767717718370254
2019	0.78525898208049
2020	0.709498302393315
2021	0.727556393997221
2022	0.735015942105173
2023	0.651369032629572