Year	annual %
1971	14.5992928698164
1972	20.940994987157
1973	18.2397959188217
1974	24.4246673859205
1975	18.611372010313
1976	14.8687336300479
1977	14.9591685227511
1978	11.7832512318923
1979	12.480169222314
1980	13.5715405108088
1981	10.5767903960919
1982	-0.91264667535856
1983	6.05263157894738
1984	4.09429280397013
1985	0.834326579261015
1986	0.236406619385382
1987	2.59433962264135
1988	1.83908045977014
1989	1.58013544018057
1990	3.88888888888912
1991	1.98675496688732
1992	3.24675324675323
1993	1.38364779874215
1994	1.73697270471466
1995	-0.243902439024484
1996	-1.10024449877745
1997	0.618046971569916
1998	2.57985257985245
1999	6.34730538922154
2000	6.26876876876879
2001	5.96962204168156
2002	0.174999999999924
2003	3.30255386407089
2004	3.85730391367397
2005	0.907187718073944
2006	-0.353465498693757
2007	5.32060027285141
2008	36.964758287529
2009	31.7544407744179
2010	-2.40463875108225
2011	2.5592677223094
2012	7.11037062326413
2013	4.33893848329099
2014	1.38583454581263
2015	4.04194410725617
2016	-1.01548191697642
2017	2.85679575568496
2018	3.7029183911151
2019	2.07476436485028
2020	8.27685811437216