Year	annual %
1961	5.123400871336497
1962	5.02001994039407
1963	4.956264148935161
1964	4.873985452140551
1965	4.76445538443296
1966	4.645554069882626
1967	4.520073606614574
1968	4.408412137802562
1969	4.303432161034251
1970	4.237850419257425
1971	4.202720715355549
1972	4.145175813017227
1973	4.086171966534898
1974	4.019748042966312
1975	3.9548203050690955
1976	3.911561264929385
1977	3.87359901245006
1978	3.8450771704416153
1979	3.80231527870405
1980	3.7612619521405093
1981	3.695892707071365
1982	3.623167187694337
1983	3.5484189856584867
1984	3.4642525519898006
1985	3.3658066223407994
1986	3.266080008583199
1987	3.1628479986153653
1988	3.0680430230675118
1989	2.970844297146685
1990	2.87472984486413
1991	2.7636348884265356
1992	2.662979206581422
1993	2.588308071157166
1994	2.5334366832127553
1995	2.477506949577783
1996	2.4181513686295517
1997	2.4483634280816156
1998	2.3913514466864254
1999	2.312433772716016
2000	2.227693973565337
2001	1.7643339121442585
2002	1.6630064843147563
2003	1.5793726540722752
2004	1.5254940721635313
2005	1.4957830471607307
2006	1.4496950253499787
2007	1.3981936875778693
2008	1.3473390069587725
2009	1.304771880097898
2010	1.2850668095719
2011	1.2789566609780025
2012	1.2447766366360353
2013	1.204555808618318
2014	1.1894093245539406
2015	1.1706414140940484
2016	1.1278820769593914
2017	1.1020965880334732
2018	1.0945584766721936
2019	1.0602375534579185
2020	0.9515534107949941
2021	0.8084230040965346
2022	0.731782791660602
2023	0.7794821051401406