Year	annual %
1961	-0.6209094681308756
1962	0.7467029666908189
1963	1.9711929248273492
1964	1.852878209161375
1965	2.5525698565269153
1966	2.7964636570337262
1967	2.602043063267061
1968	2.617266045456674
1969	2.7009651574185085
1970	2.7004438494591056
1971	2.6808992071377844
1972	2.433830039904535
1973	2.1815619158288797
1974	1.9013769730232184
1975	1.8404074277988087
1976	1.5319033562636548
1977	1.4047360225004581
1978	1.1056894020153862
1979	0.7845756861871109
1980	0.6770783502269211
1981	0.658651676242286
1982	0.774427766338647
1983	0.8726350479503822
1984	0.7392333440787553
1985	0.7378730599805579
1986	0.790254644843742
1987	0.836781078795795
1988	0.8026760502223453
1989	0.7102539853221685
1990	0.6277348496781769
1991	0.443757319211187
1992	0.29352244984694664
1993	0.20273981349512837
1994	0.1351549575653479
1995	0.0502096364031388
1996	-0.025957844643457406
1997	-0.08225870595629203
1998	-0.17802620418110848
1999	-0.30082350380968137
2000	-0.4379093756689656
2001	-0.6982051953158646
2002	-0.9010101172050753
2003	-0.9926875108797191
2004	-1.0755980078115641
2005	-1.1301644177682135
2006	-1.1469702925455891
2007	-1.1866337452694609
2008	-1.246181502908243
2009	-1.3019058568589799
2010	-1.3558542503738096
2011	-1.2349540216502959
2012	-1.1372852770829383
2013	-1.1820224310433218
2014	-1.2543117929631649
2015	-1.326268362521077
2016	-1.3695966344158848
2017	-1.3869546436149562
2018	-1.4857172393250409
2019	-1.5550579415081245
2020	-1.625775025382083
2021	-1.732720666478997
2022	-1.7945853597795036
2023	-1.8076961158583345