Year	annual %
1975	-49.67693306170566
1976	47.287608225108215
1977	12.30218140068888
1978	23.47610596308139
1979	2.49051154842257
1980	-23.28721087292303
1981	-11.46335299073294
1982	24.834194475369422
1983	10.676718092566627
1984	0.7348534870612335
1985	17.724556580650066
1986	18.65544656805524
1987	14.990651644038097
1988	9.740701960483879
1989	21.074596531782937
1992	19.62024245364443
1993	65.63861694301396
1994	11.72090308620887
1995	20.670139394667892
1996	-6.232599703467519
1997	-4.13374882862544
1998	150.98727260676347
1999	10.541362179972962
2000	21.220239956081855
2001	-5.112304815153887
2002	-17.442710473116705
2003	13.857825396209275
2004	57.58495707685141
2005	28.915716707081717
2006	32.431955680718005
2007	24.72892607382032
2008	37.69241077193494
2009	25.661619462258738
2010	28.423995342501396
2011	30.139698576853835
2012	2.2021795318111055
2013	22.645007198296586
2014	-7.9531868579418825
2015	8.71028974407627
2016	-8.129628321700409
2017	10.638705868465445
2018	3.0325341581034593
2019	-7.39979860973077
2020	2.40361281526271