Year	annual %
1964	26.07415730337106
1965	16.478619681657143
1966	25.27697863744869
1967	40.749517504214154
1968	31.771475187891348
1969	11.950472552441939
1970	22.486174844099192
1971	7.753527823940211
1972	21.486995475718317
1973	37.83269124931204
1974	32.92072948360659
1975	10.024752970956893
1976	38.05832276102074
1977	59.2366311570511
1978	54.27860086870287
1979	4.9918882352847485
1980	62.73705388428138
1981	51.995667962111156
1982	74.87829393703561
1983	1113.0046592245596
1984	-81.70201045223648
1985	31.738214025032157
1986	57.31267801892572
1987	94.30074707787784
1988	131.49659247839787
1989	67.40596062104589
1990	195.38650597263424
1991	2388.5671617312205
1992	3794.4489546205104
1993	2853.124915926657
1994	6968.922518159806
1995	357.6323059190639
2001	41.42720186182681
2002	38.44250163099156
2003	29.735712325652734
2004	81.85423550275738
2005	23.34078444037476
2006	56.53031673401049
2007	50.586762528240016
2008	55.0502772933809
2009	56.214045918776435
2010	34.764283862489634
2011	21.496857051521832
2012	20.670607885718752
2013	18.74037715095977
2014	14.660309823612543
2015	9.385459484265473
2016	21.774899833106975
2017	34.26826216279341
2018	35.801481454545