Year	annual %
1961	4.375804375804376
1962	6.59679408138101
1963	26.234817813765183
1964	2.171721799688445
1965	3.6457399103139014
1966	-2.0205079392549647
1967	11.15428773293297
1968	8.918639758461783
1969	5.270452638873691
1970	8.374333033053842
1971	10.639726333962084
1972	15.641344236715115
1973	2.8460769615192403
1974	11.960931995432347
1975	3.5024521505143005
1976	32.49119423012412
1977	39.63097178484959
1978	31.38479322733094
1979	42.766324506167514
1980	28.710221196430407
1981	19.872598309134524
1982	25.36565881242633
1983	20.922735720867756
1984	16.016646173240062
1985	12.78859277830597
1986	4.235078125771141
1987	15.439349403796912
1988	14.862623435472308
1989	8.351303571811158
1990	19.869903410818264
1991	21.871713928214927
1992	16.803406146307506
1993	23.306427256773105
1994	19.667292569449508
1995	35.83221247621851
1996	11.260410334961573
1997	15.593722491035173
1998	13.208634568303054
1999	13.389567616550066
2000	12.864804036244015
2001	13.59213721196455
2002	13.3575243836281
2003	15.318795004551964
2004	19.61481336985248
2005	19.056802436098135
2006	17.83062851414299
2007	16.560134207562925
2008	8.45751130560778
2009	18.610061961444625
2010	15.793550639536322
2011	49.983218526845334
2012	17.6277361444479
2013	16.228533875489468
2014	14.506698090752982
2015	17.03489286527224
2016	16.186132232413676
2017	17.40450490562014
2018	11.410448936182332
2019	8.323544318361972