Year	annual %
1971	3.86326089701576
1972	6.39824135128871
1973	12.9408133340937
1974	22.0249772717617
1975	13.29259312386435
1976	10.24602300215335
1977	11.78257053912155
1978	10.30612922229655
1979	13.1698355431799
1980	17.41863626798985
1981	14.0479686718868
1982	10.5278072972983
1983	11.7997405215176
1984	12.19749817053585
1985	11.193606860484351
1986	12.1033355293699
1987	10.276896433030474
1988	10.108087815422325
1989	13.499790561996601
1990	16.42233597503325
1991	19.7485448195578
1992	13.7560522776637
1993	14.470440986124501
1994	22.8462417553045
1995	15.7422305021596
1996	9.941270727685815
1997	7.437395452163045
1998	7.469713500380214
1999	5.18149279747878
2000	4.76382472733251
2001	5.40833545566148
2002	4.223605327971415
2003	4.268953958395
2004	4.71037060105879
2005	4.93717004981791
2006	5.79652337561634
2007	5.54438485815156
2008	9.73228317146881
2009	3.66490330642919
2010	4.15672722680174
2011	5.671576105366865
2012	4.3874765699828995
2013	3.89555152647667
2014	3.503790931398115
2015	3.26150906442242
2016	2.242974557124835
2017	3.32817337461298
2018	3.227034710461425
2019	2.58405829251271
2020	2.47302844771244
2021	4.27166381536798
2022	8.95773596177512
2023	6.0739085322053