Year	annual %
1961	2.1665304009110935
1962	2.144220214266198
1963	2.034244091179021
1964	1.5374430809209056
1965	1.4461894882597401
1966	1.3521807099300438
1967	1.2431075634472588
1968	1.1287326268592544
1969	0.9605451578376216
1970	1.5080236480759583
1971	1.4381982934063513
1972	1.4468720540622626
1973	1.469361021487325
1974	1.4749440147333064
1975	1.4888855593033994
1976	1.4852842456433408
1977	1.462698723292178
1978	1.4163145049399928
1979	1.3637241031304683
1980	1.3194130794628405
1981	2.9831631391075533
1982	3.3071439954593425
1983	3.317900459518498
1984	3.166387569746712
1985	3.094652949257901
1986	3.0940157441969256
1987	3.003251032185105
1988	2.8507053143299803
1989	2.7468642796864824
1990	2.6522561703905505
1991	3.1809144372894296
1992	3.2059105928146536
1993	3.1701871822690735
1994	3.183994704547578
1995	3.1938332249536847
1996	3.2161919315883747
1997	3.289815218095581
1998	3.3042663662966523
1999	3.3299918519532805
2000	3.4684716977502315
2001	2.688828342901233
2002	2.326153649495544
2003	2.3486714802594957
2004	2.428265335340296
2005	2.553149779864736
2006	2.6861127327695336
2007	2.7535939056089926
2008	2.779151648448711
2009	2.7565882428365103
2010	2.685922370106138
2011	2.55586146149805
2012	2.461716003532531
2013	2.410882737544155
2014	2.3690091493381313
2015	2.2922239619658455
2016	2.2291597733749122
2017	2.1745484475760897
2018	2.101556479994662
2019	2.027242619841124
2020	1.9329033378695717
2021	1.8188211624676327
2022	1.7144418058047235
2023	1.6566041390605932