Year	annual % growth
1971	3.3346024485785932
1972	5.382738664583698
1973	5.673266411162857
1974	-2.2747872309931836
1975	0.32387594935414654
1976	4.685441773294954
1977	3.3230645580244413
1978	4.773749548273386
1979	1.4637029490320828
1980	-0.9566746016730718
1981	1.7546741416497582
1982	1.2670105231817956
1983	2.810022434057686
1984	5.225039641840496
1985	3.8575749941359447
1986	4.43451132087948
1987	3.6876968321840167
1988	5.515856457976767
1989	3.072573237244086
1990	2.51388747187346
1991	1.304357714810365
1992	2.06139176734456
1993	0.8416651912483246
1994	3.7409747421571353
1995	3.1881380057238857
1996	3.1439459048069978
1997	3.7733040361328705
1998	3.5623362498797775
1999	3.1596782558265772
2000	3.464130189676794
2001	1.6523364582171638
2002	1.3453361874691865
2003	1.8319629738161325
2004	3.3423647147842814
2005	2.3245621846608344
2006	3.060941826811387
2007	1.5233575211375694
2008	-2.1880687922450903
2009	-2.701696396697315
2010	3.9199192940084373
2011	1.3911320590712393
2012	1.7140069192431753
2013	1.3316912213521732
2014	2.493314402785572
2015	3.0476465290518746
2016	1.648841078710788
2017	2.605409977538514
2018	1.9546233655852063
2019	1.5478294919330864
2020	-4.933015042699793
2021	4.784180957978705