Year	annual %
1961	4.917099619506075
1962	4.951127843489672
1963	5.056403923834267
1964	5.127608977473557
1965	5.180043213974031
1966	5.228833866549948
1967	5.344025205699992
1968	5.793911060393668
1969	6.082399929903474
1970	5.929630698034444
1971	4.653931899448267
1972	4.635488051905725
1973	4.538759242015658
1974	4.332816786278883
1975	4.275988425309407
1976	3.981606970066082
1977	3.929478680386069
1978	4.1188013364402
1979	4.172581739756694
1980	3.7535620380556196
1981	3.4830795179877185
1982	3.7656385120436795
1983	4.222733622626464
1984	4.531342243536457
1985	4.671478949585634
1986	4.561713805009532
1987	4.502063259278685
1988	4.403369606099886
1989	4.345060092929359
1990	4.133828829755544
1991	3.849841999051563
1992	4.300723977347616
1993	4.5352607079964145
1994	4.269302117975386
1995	4.0509363177885405
1996	3.6955875474673547
1997	3.7008212788276325
1998	3.6924334011439157
1999	3.7183590452678317
2000	3.6378670421686365
2001	3.665700633320526
2002	3.908886366549652
2003	3.90474133223573
2004	3.7933892787182373
2005	3.90190910336068
2006	4.105305767483472
2007	3.8764366197371345
2008	4.170434807238465
2009	4.066797314183617
2010	4.1018318102671145
2011	3.8691787870099006
2012	3.626591314912318
2013	3.352451472720233
2014	3.348268243713477
2015	3.731036226641166
2016	3.9648828678250396
2017	4.070574677916625
2018	4.1305285624413415
2019	4.239679801547354
2020	4.220237548571532
2021	4.130706885748509
2022	4.138841013871215
2023	4.218177804357666