Year	annual % growth
1971	7.997426334790944
1972	3.3661006851355353
1973	-5.262034368662611
1974	50.80328977016674
1975	17.387731317191253
1976	-4.263430218867541
1977	39.89616294838726
1978	-13.835575428976028
1979	13.069757951104904
1980	-0.41653253733673523
1981	-8.263131085555315
1982	-15.454802697262693
1983	-1.200474885383386
1984	-1.1025675442465115
1985	38.69306137221446
1986	-10.951690843767622
1987	18.492896203459026
1988	-3.477834600810837
1989	5.701435310373853
1990	1.1284737252185977
1991	1.632944822302207
1992	13.129943312472108
1993	-0.46013297694122457
1994	2.626579201292529
1995	-0.0513839033545338
1996	-4.062144503106495
1997	-1.6266156892403956
1998	-6.345931703774099
1999	11.529306938044769
2000	-2.4034087126339756
2001	10.359725317204067
2002	0
2003	2.4374665183170663
2004	40.175392722811125
2005	25.99307418939796
2006	-12.697903518179317
2007	11.317829794450546
2008	7.642291984460712
2009	-22.960112207664025
2010	15.114830315862847
2011	-16.195335933120276
2012	-45.52468005527317
2013	-18.584066830396367
2014	-14.472242864613435
2015	-1.5884253478702988
2016	-2.5034988816658483
2017	31.268195172996684
2018	-6.233264517711504
2019	-2.18099774379543
2020	-11.772112406123952
2021	122.00022732726285