Year	annual %
1961	2.4995822308549123
1962	2.5288999028662005
1963	2.5571590633211656
1964	2.591839692358434
1965	2.624822735306381
1966	2.6334648374601386
1967	2.654703660661937
1968	2.6830616243808834
1969	2.6769829750820975
1970	2.6132525940939786
1971	2.414484004157174
1972	2.4426275606272156
1973	2.636711492344034
1974	2.6723329096779054
1975	2.641616365494272
1976	2.5945200042100396
1977	2.620007373209333
1978	2.7347190300912985
1979	2.810239544963423
1980	2.759277253682214
1981	2.731020747525534
1982	2.822957157376365
1983	2.8257741135514465
1984	2.767273414313692
1985	2.7798019351496634
1986	2.7558904898756964
1987	2.736113884811303
1988	2.691992618524594
1989	2.6778534563491263
1990	2.6388233289425784
1991	2.588652025378039
1992	2.62903602367615
1993	2.6869942282175856
1994	2.626845739702304
1995	2.57151716752702
1996	2.556708393888414
1997	2.494740113013961
1998	2.4572468060132024
1999	2.4527667343102024
2000	2.477118519958907
2001	2.4906945065130657
2002	2.510134134893562
2003	2.471859297692575
2004	2.4077936709876013
2005	2.3819208634982942
2006	2.388826367352209
2007	2.377170656041244
2008	2.3269123529553184
2009	2.3307069308749533
2010	2.3882780649415736
2011	2.3756720487220946
2012	2.2743241090610127
2013	2.1662611079836296
2014	2.127992887173363
2015	2.1284396209074714
2016	2.1696872645350425
2017	2.2090140400571556
2018	2.2303672071301435
2019	2.251231106795302
2020	2.275228041999469
2021	2.2650655962165303
2022	2.22281677555911
2023	2.223231533146958