Year	annual %
1961	-0.0524494986769497
1962	1.324408285171458
1963	2.5615377500342333
1964	2.456595231762847
1965	2.463960581071902
1966	2.745829156641193
1967	2.6007352136127224
1968	2.6339065413722977
1969	2.7292144535433494
1970	2.7358228664331534
1971	2.7184674340881827
1972	2.497180074666943
1973	2.3534180942349536
1974	2.169646444783396
1975	1.9184837328471787
1976	1.7388250396139142
1977	1.6162683675576375
1978	1.614338054118008
1979	1.6060736943252323
1980	1.5474391767237279
1981	1.5734163944175634
1982	1.7124113488253982
1983	1.6898571129781317
1984	1.5862605817002589
1985	1.6059920344846574
1986	1.6805765827354406
1987	1.7509063344155464
1988	1.743366817957991
1989	1.677657566746447
1990	1.6238877072055402
1991	1.5404540032064773
1992	1.4360730973982356
1993	1.3760068466081634
1994	1.3441406513811387
1995	1.2928665642705681
1996	1.2545881530684682
1997	1.229118314683177
1998	1.1690394902269077
1999	1.0802292394498778
2000	1.0001441961217807
2001	0.9408554716606545
2002	0.8926006341388018
2003	0.8521102856368117
2004	0.8209464034864169
2005	0.8092713750883291
2006	0.7873194620811006
2007	0.7629349953667912
2008	0.7507675253856121
2009	0.7355015879515747
2010	0.7235256046278522
2011	0.7658648293758574
2012	0.8565791574498292
2013	0.839699129693642
2014	0.8025778714644929
2015	0.7616069907071363
2016	0.7520531193679432
2017	0.762475193474387
2018	0.6538275895177463
2019	0.5665781521216218
2020	0.47411836441814614
2021	0.34255417560045487
2022	0.2582241077622598
2023	0.21408964789702623