Year	annual %
1961	10.433673865868801
1962	10.46589385376308
1963	10.415380411571332
1964	10.317280060275982
1965	10.179881969182754
1966	6.732826927682871
1967	6.710561652490032
1968	6.693311199636674
1969	6.736110663816546
1970	6.86851185102001
1971	7.020565415080138
1972	7.1416117424393635
1973	7.170893982251067
1974	7.1676169749635115
1975	7.410720604687396
1976	8.274029005901282
1977	7.805163895216487
1978	7.740660481226354
1979	4.352299485208645
1980	4.358190526839967
1981	4.337946119182582
1982	4.298424129955487
1983	4.241947302648781
1984	4.168151427396674
1985	4.073644507647402
1986	3.9781526551173223
1987	3.949411642473387
1988	4.179699853404376
1989	4.6791892113889855
1990	4.772700030808949
1991	4.717661220687875
1992	4.654171294555741
1993	4.5827547969933
1994	4.503519543244558
1995	4.454760641059916
1996	4.42327948415334
1997	4.382526597032537
1998	4.253673279620887
1999	3.961934412452748
2000	3.7022140819955696
2001	3.5714668150148094
2002	3.4585339477876946
2003	3.357976386574605
2004	3.274513349409985
2005	3.193663705892328
2006	3.129497989510715
2007	3.0745102273111247
2008	3.038019087227426
2009	3.015027884694792
2010	3.0077123810896875
2011	2.9608093958470314
2012	2.933226843796155
2013	2.932079401123372
2014	3.177891895258713
2015	3.4542478972069266
2016	3.4606195620633087
2017	3.4744236413023946
2018	3.4625740187454257
2019	3.4330990473413814
2020	3.415901461715231
2021	3.367846789486959
2022	3.3702917297591366
2023	3.421045989095091