Year	annual %
1961	2.6330141251816497
1962	2.3491835321927756
1963	2.3258826879938534
1964	2.4931544349339916
1965	2.6072240309775103
1966	2.5538636329496933
1967	2.5631660650763095
1968	2.5848539385426914
1969	2.608034318751217
1970	1.8532180732381165
1971	0.2713071174898363
1972	-0.23618283571299176
1973	-0.478750533062766
1974	-0.5023299284124028
1975	-0.40748694147983583
1976	-0.19247454467036762
1977	0.07608360052224986
1978	0.2089319119918825
1979	0.31021728230049134
1980	0.3116149830365179
1981	0.16485720038099885
1982	0.11288806466954117
1983	0.1479724524557901
1984	-0.19264207432965708
1985	-0.606183970314112
1986	-0.6432111417986495
1987	-0.6809329969651915
1988	-0.7049144441275615
1989	-0.6661604277255213
1990	-0.611920921579935
1991	0.42216292764911817
1992	2.1846025885951703
1993	2.3801399007261757
1994	2.4338475998912585
1995	2.5244581408459537
1996	2.5875004002498243
1997	2.5685030692809523
1998	2.4282768004983013
1999	2.250386651699363
2000	2.193005060612437
2001	2.101741990954942
2002	2.2146457484228765
2003	2.0488439866280346
2004	2.000486125989626
2005	2.0479629268639052
2006	2.136807262662703
2007	2.219193157084924
2008	2.320041123422327
2009	2.3353473429139804
2010	2.1524089177473114
2011	1.9225485806028508
2012	1.3212146156502775
2013	1.170868374542604
2014	1.066002235144342
2015	1.0206678935234303
2016	0.8943520998189087
2017	0.7888057408036109
2018	0.7059468048921264
2019	0.6578686353677395
2020	0.687849322249346
2021	0.6675468691963102
2022	0.6264736561825839
2023	0.5875424525853735