Year	annual % growth
1981	21.83814781875843
1982	0.3065483930563033
1983	52.229147769192764
1984	-7.424030294640403
1985	-24.670463497412925
1986	-13.693835609674124
1987	73.19162262477059
1988	6.121371708620657
1989	8.316135313018293
1990	-0.6760865583064799
1991	3.689690883688229
1992	9.922793716558061
1993	-3.6870818105319074
1994	0.582109920707282
1995	-4.423112276208315
1996	-9.937086132050581
1997	1.912288653111034
1998	7.164405802327423
1999	-29.684528944635602
2000	-15.77289311373498
2001	6.750233323135319
2002	-6.099939945709892
2003	-7.057057602010147
2004	5.810480222081409
2005	-2.6746541817085614
2006	-1.342257528222774
2007	-2.538373270923998
2008	-4.397922340062394
2009	5.013283665890128
2010	0.020593740210046008
2011	-6.698499606068978
2012	-1.2726271240830869
2013	6.235645897905371
2014	3.0990733874346716
2015	5.575975685777678
2016	8.092078368562412
2017	-1.2988182484949533
2018	35.578329231336056
2019	1.0484450534908234
2020	-8.195306689158471
2021	11.431394103213137
2022	-10.755547543615862