Year	annual %
1961	2.0535955782572968
1962	3.873678110119421
1963	5.493641020579922
1964	5.327343510552032
1965	1.2105428546174775
1966	1.83735115939042
1967	1.8424034566762837
1968	1.8829289018095632
1969	2.0123951470586556
1970	2.0287359591848335
1971	2.12429188312895
1972	1.8308316715941515
1973	2.2833957629140524
1974	2.6924795973146063
1975	2.3890157231346154
1976	1.891572391973933
1977	1.7058329853857097
1978	3.4839450721872343
1979	5.261370930970638
1980	5.157283704566449
1981	5.131868950718211
1982	5.295666245951876
1983	4.474842021612287
1984	4.320433024513804
1985	4.339047123593076
1986	4.438100593163095
1987	4.531582208445497
1988	4.51483099420354
1989	4.402632038310697
1990	4.309678480702475
1991	4.601685132143183
1992	4.425117290267988
1993	4.301547742837871
1994	4.24584059723498
1995	4.159637994183016
1996	4.086051743942729
1997	4.008285507958054
1998	3.9080785656989603
1999	3.770088729766077
2000	3.6492527111585384
2001	4.059565757675961
2002	4.198001147646309
2003	4.0784035264976755
2004	3.9753721295435827
2005	3.8824729757586156
2006	3.674728093257034
2007	3.5112555518277544
2008	3.4339576888902608
2009	3.338102467826714
2010	3.255365494092436
2011	3.1233771769448246
2012	3.130656595525652
2013	3.048365006284005
2014	2.953497441918332
2015	2.842870547791506
2016	2.7756417692088906
2017	2.7396638203529986
2018	2.5034005035380757
2019	2.2901772336289743
2020	2.078140057792124
2021	1.8385302823153327
2022	1.6494808568802393
2023	1.4727619653969692