Year	annual % growth
1971	16.656053852451564
1972	27.217196922437097
1973	-5.559528431032007
1974	37.116524598675966
1975	40.18744674808292
1976	31.457095263821373
1977	15.98328724196682
1978	-13.35621747314805
1979	1.6179327267150683
1980	21.890484694519202
1981	2.030540652084184
1982	2.795755467464872
1983	5.848674243666352
1984	1.1189799066897166
1985	4.860817509482061
1986	-11.406717464472706
1987	-32.63331464564851
1988	-3.977951399087516
1989	-9.08896252867703
1990	11.89870010430569
1991	3.6804650696602152
1992	32.55930859805497
1993	1.4301133297355761
1994	20.700588857013443
1995	-0.016679176048711497
1996	-0.29491319423758
1997	-5.02357320840629
1998	3.221889470505346
1999	-2.603846036631822
2000	-2.31612148216756
2001	14.130128385823753
2002	0
2003	30.19736398949189
2004	10.271013692960366
2005	12.677945161025477
2006	7.104960911611329
2007	-8.283954656930234
2008	-5.867558698547143
2009	11.487196421602476
2010	13.571524739145076
2011	13.032087510854382
2012	-51.24857758643292
2013	5.5013848925699875
2014	-35.2893497277788
2015	110.92414466791135
2016	-11.82916581075277
2017	66.83991816090787
2018	17.85819470680235
2019	-12.985107744274572
2020	10.866153038690456
2021	24.04028449248014