Year	annual %
1961	2.381391337351559
1962	2.392210066931952
1963	2.3990720237251963
1964	2.4003818057174158
1965	2.354248261977972
1966	2.2925448160912083
1967	2.2847911791007363
1968	2.321767545753616
1969	2.3399770371644024
1970	2.3130351534091744
1971	2.1843790372364253
1972	2.2091514724021266
1973	2.3506021962789134
1974	2.3542245740648013
1975	2.331804354819141
1976	2.299481964850486
1977	2.3098219793100867
1978	2.3279689689172756
1979	2.335978232201839
1980	2.371123993687533
1981	2.345153430119808
1982	2.3566135929908256
1983	2.4149127737113503
1984	2.4107983427491035
1985	2.3932409309145584
1986	2.359809013662357
1987	2.3223542416610456
1988	2.309949089363485
1989	2.3045913108347804
1990	2.2546303703843336
1991	2.2051675155978927
1992	2.221200495427709
1993	2.2467178751676613
1994	2.2127507985321557
1995	2.144210745547184
1996	2.084218941429185
1997	2.0471399521557743
1998	2.0242233276985644
1999	1.9976729855397508
2000	1.961818267960382
2001	1.9452893616824838
2002	1.935104750034867
2003	1.8663902750028427
2004	1.7688775690531031
2005	1.6864061087914877
2006	1.597972667508941
2007	1.5046833806898547
2008	1.463047121984033
2009	1.4697348220122421
2010	1.4748435862988316
2011	1.466497037013383
2012	1.4130662475400584
2013	1.3447112725685173
2014	1.290443538055385
2015	1.2265965959046525
2016	1.2124427044993666
2017	1.2163598964308449
2018	1.187651859036265
2019	1.1444732852335306
2020	1.1244694192960765
2021	1.029463930066683
2022	0.9167826708312248
2023	1.000419361158066