Year	annual %
1961	2.0554592022183726
1962	2.145459256051012
1963	2.1859463261112495
1964	2.2169468329133366
1965	2.250379279872064
1966	2.268875536646547
1967	2.2537786843859635
1968	2.2561908447115826
1969	2.272890004179203
1970	2.265818591034872
1971	2.0959136002899754
1972	2.1182759257132773
1973	2.1853365416598223
1974	2.2337353861097142
1975	2.305965632684945
1976	2.3581044050310425
1977	2.4363090926857893
1978	2.4503462677635213
1979	2.5692030609560703
1980	3.056031647008652
1981	3.109843605092209
1982	2.8663995373735816
1983	2.5086008001315605
1984	2.3254761526646064
1985	2.46138866504144
1986	2.5196598288275425
1987	2.495112713152153
1988	2.477363618678325
1989	2.3773709472834526
1990	2.256112889359187
1991	2.372435535321401
1992	2.10010483372929
1993	2.0405847954722276
1994	2.120208060666684
1995	2.133260950421942
1996	2.172182002038298
1997	2.1137508727886285
1998	2.084498883732607
1999	2.0773495841792737
2000	2.2042489888696366
2001	2.0677991485654132
2002	1.808986089480129
2003	1.6869639179158042
2004	1.7045617598056708
2005	1.6565818618344679
2006	1.6335104161620393
2007	1.6584765690257797
2008	1.669313143024226
2009	1.6965996725504198
2010	1.7464543367103005
2011	1.6858643793788701
2012	1.4983911308730882
2013	1.3599807213124109
2014	1.2748355724380644
2015	1.1834942935118562
2016	1.1178855210947916
2017	1.1579709110821454
2018	1.201463848682252
2019	1.196644149846989
2020	1.2318442684568538
2021	1.236952569406185
2022	1.2323257610435974
2023	1.2490256919782894