Year	annual %
1961	2.2727304826675954
1962	2.5566378011257114
1963	3.7081302600516777
1964	3.6872256077199546
1965	3.690703211446835
1966	3.6185125479238254
1967	11.513900777789967
1968	11.356578133829869
1969	11.162975911382352
1970	9.543386307356664
1971	15.690029551308523
1972	16.369719451635348
1973	15.924601768968635
1974	14.87192895534754
1975	-189.7434169163269
1976	0.9233193821168193
1977	2.994806217826749
1978	5.96993399034635
1979	8.785008506769499
1980	52.47641895493336
1981	27.89207177024842
1982	6.1746190636793745
1983	6.116421794098586
1984	5.829230189495643
1985	5.552258370682293
1986	6.001929469612934
1987	6.221625981411323
1988	5.823151823433236
1989	5.756773253853501
1990	6.067316934740992
1991	6.006828066634135
1992	6.997333266758609
1993	7.415795467343261
1994	5.904156129014649
1995	4.758535391927648
1996	4.506903320602166
1997	4.311445524639038
1998	3.6766217851414265
1999	2.575814617589181
2000	2.456757645475426
2001	2.4213357436061633
2002	2.4195597009995145
2003	2.402337466442627
2004	2.3934826767120088
2005	2.3757688140057
2006	2.3489806461769183
2007	2.3632986065567816
2008	2.467234865091032
2009	3.325629880612872
2010	3.2671370936521544
2011	3.255822995192824
2012	3.2430778650594037
2013	3.2113927294719207
2014	3.175027434483354
2015	3.1185403611756723
2016	3.0942504108697833
2017	3.0575753954151548
2018	2.9813435599226064
2019	2.8996920924232854
2020	2.937896228955685
2021	2.9484123564441505
2022	2.8640361594812243
2023	2.8493940926434993