Year	annual %
1971	2.2233286262944034
1972	4.075701152667648
1973	4.740581690346431
1974	-0.8836134706882319
1975	-1.0160113124291001
1976	3.7705042630817047
1977	2.7289319904960223
1978	3.6941975383289645
1979	1.996365416512603
1980	-0.9533420709938127
1981	1.0385237971601384
1982	-1.018146603769381
1983	1.7844863345625157
1984	4.922402740148371
1985	2.6140023591432
1986	2.3465329708224516
1987	2.9821959744185307
1988	4.130070206422644
1989	2.3074432717770605
1990	1.67256412563151
1991	0.21003895774478565
1992	1.778345319568004
1993	0.8535708800059325
1994	2.9963818393211596
1995	2.1630764153736095
1996	2.6029814320979767
1997	2.9332987179024457
1998	2.623653912415506
1999	2.688711335335057
2000	3.2396230808844564
2001	0.9398169160211438
2002	0.6520299236665323
2003	1.1922389882696507
2004	2.502272038214116
2005	1.9319781598377261
2006	2.3223419168426602
2007	1.1514302531570024
2008	-1.653630289611712
2009	-2.936781604511026
2010	2.5792765299292455
2011	1.0885331881186318
2012	1.0068314220848862
2013	0.7586731298741256
2014	1.8399950342789566
2015	2.2081598069356687
2016	1.096880306742193
2017	1.9956561350139594
2018	1.587876698712492
2019	1.4749130196302787
2020	-4.72974055996302
2021	5.764881439342815
2022	1.6457874053144508