Year	annual %
1961	5.903698820081496
1962	5.998202526200927
1963	5.803531136083554
1964	5.246814675047718
1965	4.463701012946393
1966	3.5742897850341544
1967	2.8258205495662216
1968	2.4634631084529386
1969	2.629649349513765
1970	3.21996256250252
1971	3.945911792742491
1972	4.540601543643884
1973	4.8693512390455265
1974	4.8518205224470705
1975	4.57867511511226
1976	4.243495143969326
1977	3.987090982922089
1978	3.8398402866311097
1979	3.847479642062063
1980	3.950956764227968
1981	4.075785401533351
1982	4.136638250656845
1983	4.0633894535818404
1984	3.8126590047656888
1985	3.432891778451615
1986	3.0183602158765566
1987	2.656321238224729
1988	2.414961237677795
1989	2.3379730278532764
1990	2.392415383220224
1991	2.4417676604631935
1992	2.3514992531007075
1993	2.338718594004999
1994	2.2268241804590416
1995	2.0362764538317406
1996	1.8270379621100126
1997	1.64849715778881
1998	1.5475008666143975
1999	1.5333857343012343
2000	1.5944053763876749
2001	2.1212751543080057
2002	2.0807298464673214
2003	2.036724824018987
2004	1.080986069086432
2005	0.690419032192582
2006	0.6639399311590434
2007	0.6716482633714551
2008	0.7082868588554692
2009	0.7377835440666436
2010	0.7021808998743009
2011	0.6212711840008774
2012	0.5977939146439455
2013	0.6103066749110789
2014	0.608323988548127
2015	0.5665501613227111
2016	0.5308076262261443
2017	0.5180956954058907
2018	0.48079334151798353
2019	0.4710713145089189
2020	0.3859029710260835
2021	0.16180288603293208
2022	0.17390212339527875
2023	0.3267639423878272