Year	annual %
1960	8.6644591627191
1961	5.91670898836375
1962	6.64109326359749
1963	6.07014388428593
1964	9.79228486663484
1965	16.3899613894424
1966	8.84060374922209
1967	9.78360256063414
1968	19.086618545438
1969	6.23615806078061
1970	5.02523590072424
1971	6.79063936495415
1972	7.21972216770545
1973	9.48905109503398
1974	16.8916666665703
1975	23.6187352963326
1976	33.4832756634566
1977	38.0540914196793
1978	57.8487826251505
1979	66.6944229664876
1980	59.1450712444914
1981	75.4332687576064
1982	64.4481585387929
1983	111.150635209157
1984	110.208519562543
1985	163.399505243688
1986	77.9210255473595
1987	85.8223062381846
1988	667.019328585961
1989	3398.67901005332
1990	7481.66361124526
1991	409.530166622023
1992	73.5282942442641
1993	48.5799864468885
1994	23.7369050565046
1995	11.1287029707089
1996	11.5379424115177
1997	8.56218948953653
1998	7.24782175213469
1999	3.46965996293019
2000	3.75733833344474
2001	1.97709878502053
2002	0.193135003853722
2003	2.25937753363072
2004	3.66247320092233
2005	1.61630193862544
2006	2.00225801248819
2007	1.77998644680372
2008	5.78587598206755
2009	2.936231535967
2010	1.52832059732901
2011	3.36931095333853
2012	3.61121294940163
2013	2.76789666082002
2014	3.41194579807465
2015	3.39809194746308
2016	3.55717663556279
2017	2.99490045809443
2018	1.50915423024742
2019	2.25212191358027
2020	2.00241205759292
2021	4.27166381536798
2022	8.33370630096231
2023	6.45561348369586