Year	annual %
1961	2.5379112858690007
1962	2.5532602345537043
1963	2.5598187626008126
1964	2.5657553223412464
1965	2.508072331308682
1966	2.4556382372353767
1967	2.4797833561822813
1968	2.502860435190428
1969	2.510634805371481
1970	2.478896924733192
1971	2.3900616808584942
1972	2.40210004153019
1973	2.483312610414856
1974	2.4724239827534973
1975	2.4450758216619164
1976	2.421342433622982
1977	2.4210823207668994
1978	2.432944329283586
1979	2.4550477105872233
1980	2.5010371976133143
1981	2.595015483057935
1982	2.5983618377555473
1983	2.525742257244488
1984	2.483407466772533
1985	2.461131194628223
1986	2.448666370135143
1987	2.4232095525624118
1988	2.3971145339003073
1989	2.3607083315499295
1990	2.457282320307513
1991	2.3290702410601654
1992	2.201768492575937
1993	2.099424625731544
1994	2.005007364882829
1995	2.003514266103963
1996	2.060218272645912
1997	2.0204830600470984
1998	1.952099339526427
1999	1.9012519370053838
2000	1.885652380592262
2001	1.866038289737972
2002	1.7817719200089925
2003	1.7184009732753367
2004	1.7010787160118355
2005	1.6580946294984216
2006	1.6296215457831948
2007	1.6021268926909755
2008	1.5564844819184316
2009	1.5307640989704367
2010	1.5494856218735578
2011	1.5313475991914913
2012	1.462729624744867
2013	1.4248865378952758
2014	1.4049145225934154
2015	1.3953709238749212
2016	1.363403830522742
2017	1.3210201436935733
2018	1.2964336932477636
2019	1.2653036808420524
2020	1.1942132122177043
2021	1.0930839572306041
2022	1.0591450173187695
2023	1.1281488138146472