Year	annual %
1961	3.1033343319455895
1962	3.012855315335969
1963	5.0137992732698535
1964	13.557594354150936
1965	12.277961360550677
1966	9.316906497438211
1967	10.1151075088395
1968	18.295793692870447
1969	8.138430476350749
1970	11.981089943679407
1971	6.6403424278692995
1972	7.129489774752699
1973	12.575532138610797
1974	15.233435329526685
1975	22.19156776955728
1976	29.712922577851458
1977	35.74134122096271
1978	63.73821735307726
1979	76.34984545433016
1980	37.92997311585512
1981	65.33058093606556
1982	66.66333314455676
1983	107.39685323912965
1984	108.47753323460356
1985	165.73497247931135
1986	68.36351395652088
1987	85.64964330407511
1988	586.2787311315263
1989	2572.325926209786
1990	6261.2395586102975
1991	378.0405787097723
1992	69.26061762375525
1993	46.384682865326965
1994	26.68824123494049
1995	13.578797877150222
1996	9.687741961214797
1997	7.283131128656123
1998	5.37109035742958
1999	2.9345454117467966
2000	3.5247200388048014
2001	0.4552483029020493
2002	0.10901702378551192
2003	1.8037246653412922
2004	6.279038577105055
2005	3.5037224004985887
2006	7.656248078896823
2007	1.490675954539043
2008	1.1032762920285535
2009	2.063698334406155
2010	5.710728594075221
2011	6.745787124756902
2012	1.202584940227382
2013	1.0572343514957652
2014	2.4324410850177856
2015	2.6905209007433086
2016	3.0808826903773365
2017	3.6156582610597354
2018	2.277415317621333
2019	1.8722162677549505
2020	3.7191711966950436
2021	10.083101828505477
2022	4.766461936701177
2023	6.566343631344182