Year	annual %
1961	5.419080872399542
1962	5.414464657738371
1963	5.367862641211047
1964	5.279460085404183
1965	5.14900292476239
1966	4.988266704610592
1967	4.817848147450819
1968	4.705514504916494
1969	4.6299939660586
1970	4.595063117360778
1971	4.77209211914653
1972	4.7343257964697
1973	4.752699351392026
1974	4.770862069788355
1975	4.7690398316149105
1976	4.759974962006691
1977	4.7986399478799635
1978	4.834232283315106
1979	4.784110383794328
1980	4.741614752678028
1981	4.404193655206533
1982	4.369648895117595
1983	4.389908153671273
1984	4.446871972875308
1985	4.531689444747467
1986	4.619970457085172
1987	4.6586410411416646
1988	4.654187719762612
1989	4.558875708353079
1990	4.460679789681995
1991	4.374927935863379
1992	5.205498941974398
1993	5.254381068089417
1994	5.1936411037455175
1995	5.09641028810221
1996	4.979382004028119
1997	4.872727666849406
1998	4.746338836506216
1999	4.599349488766754
2000	4.557395679875869
2001	4.083395446537519
2002	3.989814865311711
2003	3.879238117660455
2004	3.7730778753259044
2005	3.664056683418367
2006	3.5609791408524467
2007	3.4673046654639412
2008	3.3456074016937496
2009	3.1993272243952027
2010	2.9456413673711506
2011	2.589155654263843
2012	2.543881672170213
2013	2.489620913826742
2014	2.436255598794909
2015	2.360097086444569
2016	2.303385477247847
2017	2.223161008666505
2018	2.0932884458372154
2019	1.9896693934595044
2020	1.9191327677535963
2021	1.812110672465122
2022	1.7438520046917663
2023	1.7249825529818594