Year	annual %
1961	10.291858678955453
1962	17.827298050139277
1963	15.57919621749409
1964	22.888116179177747
1965	17.42676431424767
1966	0.08504606661941885
1967	-0.3682197988953406
1968	16.751954513148544
1969	18.000852255433127
1970	7.2121337185307475
1971	11.30786257338081
1972	13.937402732145946
1973	7.630141144331462
1974	13.473402192688688
1975	12.455807884681104
1976	24.196097065063647
1977	27.996085148030343
1978	16.262912038259948
1979	18.56403602914139
1980	16.853292318553727
1981	17.449821554183227
1982	17.95870601019811
1985	10.40950708373698
1986	12.329561450319131
1987	50.69047791549558
1988	34.53083266489492
1989	37.15664752037844
1990	40.59457548459017
2007	42.39516401260714
2008	31.38381711700122
2009	33.04506796993098
2010	26.947127700162266
2011	21.30916836376504
2012	8.727729452316597
2013	9.914483311080101
2014	8.13557154538606
2015	3.079021968334807
2016	9.725428259745325
2017	4.093274968414649
2018	2.574153784713864
2019	5.704360373338886
2020	12.063746687892216