Year	annual % growth
1971	-4.93623954644454
1972	5.773199482318375
1973	2.4388630764397448
1974	3.539723020305388
1975	28.662291299671068
1976	-12.17331249318454
1977	-3.955246530364491
1978	-8.558008589609159
1979	19.575564317242893
1980	-3.433916162000969
1981	0.9332190616114957
1982	0.9151560078172452
1983	3.2614792851991297
1984	-4.5294635004397605
1985	9.450781694529482
1986	-8.77212526302759
1987	19.385913734854768
1988	12.209203213965054
1989	17.969493791399117
1990	22.456986847075797
1991	16.285151402550596
1992	-1.5826505326749611
1993	9.33066235389252
1994	23.30739016176659
1995	2.679687180489225
1996	13.452823508585581
1997	15.133914291732651
1998	0.5021090613406471
1999	9.61916416360738
2000	0.4748270909767456
2001	12.963286044411788
2002	0
2003	-16.624578668429663
2004	23.857048148918466
2005	-1.498203991887138
2006	20.563752453964028
2007	1.412026194621447
2008	-2.26164099145322
2009	-18.979898444570267
2010	11.188145506968866
2011	-47.26975800465185
2012	-67.15922741947594
2013	-30.516539258412507
2014	-14.473143045159162
2015	-4.45539793219524
2016	-4.43918765885698
2017	29.981829194427633
2018	-14.382673528100824
2019	10.695946425613485
2020	47.102332243100534
2021	15.765916323950407