Year	annual %
1961	3.6276886003026476
1962	3.8248777438307116
1963	3.8514139085694836
1964	3.8636921905601724
1965	3.8307951250297236
1966	3.774646890132132
1967	3.8064449311441706
1968	3.8447691488660922
1969	3.859416880638335
1970	3.840077823202776
1971	3.9379104912822243
1972	4.19633344664625
1973	4.242696376295413
1974	4.262951009715891
1975	3.5732475020161303
1976	4.331051717644257
1977	4.3153268081031655
1978	4.172288486811155
1979	4.126394709049762
1980	4.3461169771162815
1981	4.302296851512153
1982	3.835207076051958
1983	3.7997170121546446
1984	3.785180303388387
1985	3.793594799004623
1986	3.789743061320422
1987	3.743044728157784
1988	3.695347895596683
1989	3.6600205676724045
1990	3.9393787453020366
1991	3.37299893149239
1992	3.21166548584479
1993	3.159828569579787
1994	3.1483461846596015
1995	3.0672735328043785
1996	3.0280822103221112
1997	3.0039437356951453
1998	2.968658609738739
1999	2.9176111402680505
2000	2.9348304354481343
2001	3.082210170515637
2002	3.1602543975929507
2003	3.1069760776868804
2004	3.0757063154154736
2005	3.03601064589769
2006	2.9943330992369397
2007	2.9630305518823405
2008	2.908845349798696
2009	2.8955883112383276
2010	2.933027872044306
2011	2.9422962183378303
2012	2.8822041133246046
2013	2.9177506919448035
2014	2.9367218296490307
2015	2.83941946090836
2016	2.7781064437532024
2017	2.754773738917109
2018	2.730034546036592
2019	2.698605320658359
2020	2.6893079166332257
2021	2.6282991466844265
2022	2.556682855497556
2023	2.608110865239439