Year	annual %
1961	3.012899905905168
1962	3.0533877084908494
1963	2.986676435176606
1964	2.6303935726914784
1965	2.3823355684356247
1966	2.453779878811319
1967	2.5043953965149064
1968	2.5218781646115627
1969	2.335287567533012
1970	1.629053535170382
1971	0.8979467894444374
1972	0.4965014392362542
1973	0.23328352861016638
1974	0.06938364476390013
1975	-0.03964190200901216
1976	-0.05783929101546753
1977	0
1978	-0.049603175620236035
1979	-0.14564475191697626
1980	-0.31850858863709264
1981	-0.9331431275363092
1982	-0.9876540264117949
1983	-0.9667173114126417
1984	-0.9640657914731441
1985	-0.9438124155609484
1986	-0.9668849737777239
1987	-1.0563385053012626
1988	-1.112573409444811
1989	-1.0778070990040758
1990	-0.777560637249289
1991	0.8266395006954699
1992	0.9783522134785535
1993	1.024107493201831
1994	0.8584352669371165
1995	0.7179590212219858
1996	0.622270842081619
1997	0.5491272965227922
1998	0.5099273817103136
1999	0.3682928473661989
2000	0.45761179493863646
2001	1.1746741560580902
2002	1.0791471632764387
2003	1.1007027861222656
2004	1.1132511561771534
2005	1.1301025158014721
2006	1.1510455835618174
2007	1.1711280098635117
2008	1.1919204543755966
2009	1.2010199295112922
2010	1.1684740543994139
2011	0.9664256303511205
2012	0.7610776001442436
2013	0.5692657521101566
2014	0.4830460556685435
2015	0.4615392808401183
2016	0.3315237644525475
2017	0.2233422912905147
2018	0.1334731821758639
2019	0.02491481345098202
2020	-0.20096086560784937
2021	-0.36628730484219013
2022	-0.2582360235366161
2023	-0.16710171211803698