Year	annual %
1961	3.17840826506028
1962	3.26861339665713
1963	3.30247612690953
1964	3.3250150112167
1965	3.34057893693614
1966	3.31938456577836
1967	3.28740362333177
1968	3.26091161121486
1969	3.22093094575613
1970	3.18178990287892
1971	3.14815413521128
1972	3.12192208692318
1973	3.09805343691442
1974	3.06275963957695
1975	3.02000777330507
1976	2.95572231528925
1977	2.95007547039341
1978	2.94592633385125
1979	2.8425571493849
1980	2.59185461062644
1981	2.23259552808724
1982	2.03453780905284
1983	1.99468010531636
1984	1.93637203383937
1985	1.86354345855765
1986	1.79010932477031
1987	1.72869101147886
1988	1.71119463203751
1989	1.68642181558025
1990	1.83597705013042
1991	1.97637378547817
1992	1.9503084540285
1993	1.92882635968047
1994	1.90443531542116
1995	1.85680777986673
1996	1.78129571544977
1997	1.72818289567839
1998	1.68579338254176
1999	1.64054838334199
2000	1.58455078746177
2001	1.54194113014521
2002	1.52045522318023
2003	1.48740053113001
2004	1.4696529746789
2005	1.42951167105736
2006	1.36053857389621
2007	1.31623681916458
2008	1.26753574174522
2009	1.23674369230562
2010	1.32657895725526
2011	1.4276397653994
2012	1.39661546186197
2013	1.317160792789
2014	1.2414667155537
2015	1.16700884975484
2016	1.13323428792033
2017	1.08042073770937
2018	0.951668643927897
2019	0.860265089734684
2020	0.727243815691995
2021	0.559420832085433
2022	0.628607802526073
2023	0.743434542137949