Year	annual %
1961	0.9728719000283146
1962	4.279369965110478
1963	4.220281842425367
1964	4.146676002801539
1965	4.051628517336194
1966	3.9258547781945534
1967	3.7660354112320418
1968	3.5729785434871015
1969	3.3312769686945214
1970	2.9766204606041344
1971	1.2063062340895292
1972	-0.27254770475446827
1973	-0.15412621150744976
1974	-0.05625530127055205
1975	0.009929705964750353
1976	0.04260379569119854
1977	0.032664402500865046
1978	-0.017778035077827048
1979	-0.062041155955489966
1980	-0.0004137368922986071
1981	1.4992612195398043
1982	3.401838473902767
1983	3.854016210804506
1984	3.970695156660008
1985	4.0718819799019625
1986	4.1262318957514355
1987	4.120641208406642
1988	4.058414552953462
1989	3.9470949594721567
1990	3.8014904600971344
1991	3.4559326061619067
1992	2.750724591258855
1993	2.2437827607992773
1994	2.120665866906686
1995	2.0211256160225126
1996	1.9818262623350753
1997	1.8345540225602388
1998	1.7041241988179623
1999	1.5971079527374359
2000	1.4877568229252986
2001	1.6592460274268794
2002	2.372558228862098
2003	2.8215044674889
2004	2.7709962800509724
2005	2.7155176123438753
2006	2.6744129396537293
2007	2.6480298074103654
2008	2.6252790773745525
2009	2.6087730292483946
2010	2.5950318244663007
2011	2.429615211873714
2012	2.039126998374903
2013	1.8039158028738738
2014	1.802575818955427
2015	1.8160160415617885
2016	1.8437998929318338
2017	1.884356438088711
2018	1.9203443717682889
2019	1.9263605288841228
2020	1.8852204974285798
2021	1.515044864486136
2022	1.2391466836124885
2023	1.2836438518769182