Year	annual %
1961	3.5284512366816783
1962	3.576980987924193
1963	3.5922312362277173
1964	3.5911269128563768
1965	3.591324627257613
1966	3.5512381186838473
1967	3.502405531686669
1968	3.4514589719691937
1969	3.4015904471620213
1970	3.9092330351476434
1971	5.412728107160987
1972	5.346673445161309
1973	5.278819458436279
1974	5.1678089096925195
1975	5.025671889003091
1976	4.875030541054345
1977	4.762969439591126
1978	4.697725617069042
1979	4.606431468720222
1980	4.231194860413874
1981	3.0988385316956935
1982	3.013981275598075
1983	2.9648143769423436
1984	2.915101832166254
1985	2.8525769080722836
1986	2.7970607690791445
1987	2.7388026759448274
1988	2.695207157195544
1989	2.6250235275143923
1990	2.528403109698325
1991	2.138310940217556
1992	2.0575660102616347
1993	2.0322909494614985
1994	2.0026980162928374
1995	1.94707538348293
1996	1.8842274230105074
1997	1.8504186550901347
1998	1.7954862118568373
1999	1.6866400450771486
2000	2.331801421225604
2001	4.5560267222652815
2002	4.474752837142504
2003	4.374975220032232
2004	4.275459211255845
2005	4.1543753889383375
2006	4.071684949891815
2007	4.010613874263567
2008	3.930471700533785
2009	3.8242006238675192
2010	3.7110248750169954
2011	2.547578443186732
2012	2.30174854622188
2013	2.240294567336575
2014	2.1585853797152392
2015	2.0626492412338977
2016	2.0123156241499336
2017	1.9517822830394986
2018	1.8342090969412483
2019	1.7292523594428761
2020	1.6805387435591808
2021	1.5905212551357615
2022	1.5160796104056862
2023	1.4955912425886855