Year	annual %
1961	1.397223698607263
1962	1.4159690147073718
1963	1.4445409219176355
1964	1.4488359271568925
1965	1.403790349054404
1966	1.511329527204282
1967	1.6780878455269885
1968	1.627635925113509
1969	1.6054567363325276
1970	1.5801053923471216
1971	1.577808005460568
1972	1.526033308788243
1973	1.5265675169803927
1974	1.580138188100122
1975	1.7533054904805851
1976	2.023716598482423
1977	2.0295597433310064
1978	1.7836972240630473
1979	1.8684445653573505
1980	2.0397243061366197
1981	2.371149399584141
1982	2.3561078960686217
1983	2.0931952285686606
1984	2.1168295610061847
1985	2.083497151356312
1986	2.0181187650830026
1987	2.0469992641538965
1988	2.0792129076194357
1989	2.065076840756632
1990	2.757873777923052
1991	2.0717296079966587
1992	1.632119977806184
1993	1.2778761512335564
1994	1.1981756063918425
1995	1.3724040940532518
1996	1.3232967763949972
1997	1.284349287227755
1998	1.2109986861364774
1999	1.1712053017576949
2000	1.166462856335329
2001	1.1612738719567943
2002	1.0312334809183596
2003	1.0133962062010227
2004	1.1286795693716556
2005	1.0566253650400483
2006	1.0342407128908206
2007	1.1168567548233312
2008	1.1135380638534826
2009	1.0907514263702325
2010	1.1390952413936333
2011	1.3344815015828004
2012	1.3016456698131265
2013	1.1748406749424447
2014	1.089614173523401
2015	0.9545229879185655
2016	0.9776820978577376
2017	0.9164567471475493
2018	0.9388229219041477
2019	0.9483421318891629
2020	0.8195690925998775
2021	0.6873059254049849
2022	0.6803903654632109
2023	0.7307434786860227