Year	annual %
1961	3.02396474203882
1962	3.03385635486793
1963	3.04062728237784
1964	3.05396927784749
1965	3.07724233867306
1966	3.11335695739381
1967	3.15878571163676
1968	3.20622474793571
1969	3.23497729247933
1970	3.24807068543626
1971	3.24817177726344
1972	3.03030032570933
1973	3.01067266769098
1974	3.17211725112492
1975	3.13710262195243
1976	3.10082785617398
1977	3.04814637336604
1978	2.91445100102962
1979	2.70453061853631
1980	2.73116665591998
1981	2.81619717151295
1982	2.73610538786783
1983	2.62019625792193
1984	2.47676596096095
1985	2.38082057820001
1986	2.3371360303315
1987	2.29550669667247
1988	2.30306938270733
1989	2.35608316909431
1990	2.35429940783244
1991	2.32547551551321
1992	2.28197565551776
1993	2.2229761685025
1994	2.1541818424195
1995	2.06848169480527
1996	1.89766474581677
1997	1.72167337352435
1998	1.59245325625362
1999	1.50287682750751
2000	1.44194534225615
2001	1.34825800349086
2002	1.26759174707907
2003	1.21066661820809
2004	1.1795695481415
2005	1.26291919571256
2006	1.36800486065092
2007	1.39429680103578
2008	1.4217078710387
2009	1.44691351664322
2010	1.4638532507888
2011	1.4717486887592
2012	1.47088300051398
2013	1.46129517647149
2014	1.44870479177075
2015	1.43794002440995
2016	1.42874739634574
2017	1.41880628469208
2018	1.40510472256985
2019	1.38548472522896
2020	1.37069568464204
2021	1.39120241997296
2022	1.41827846169398
2023	1.39938096442621