Year	annual % growth
1981	37.95206971588942
1982	-5.748578649092522
1983	6.7191689054870665
1984	-3.3757261750221517
1985	12.398440032905029
1986	-14.457134595594098
1987	-50.447861755140075
1988	87.68758410436286
1989	-36.83445396860132
1990	0
1991	17.97468353949401
1992	-12.75947556656125
1993	4.970469858882211
1994	-6.848316159324639
1995	5.92103677071205
1996	10.894399145098845
1997	37.608359413264736
1998	12.77879358566345
1999	-35.85095604032472
2000	-8.270341803533
2001	10.73022016291894
2002	19.944263995544944
2003	-16.41871642409653
2004	1.7305954688390273
2005	1.3011797239342826
2006	6.9254511654526425
2007	9.816858584115835
2008	10.341410736423782
2009	-1.255463898993412
2010	32.73828382276926
2011	20.889318625149272
2012	12.42438042115326
2013	7.042540587367355
2014	7.753142368409755
2015	-15.587913906483564
2016	-1.3085051218991453
2017	-11.493781079295758
2018	81.65163742590585
2019	21.515265625485995
2020	-16.668641532743152
2021	9.18108232251798
2022	8.280464029267847
2023	2.5082056298847135