Year	annual % growth
1971	2.9711586702567416
1972	3.7803492870428244
1973	4.176995794192422
1974	-0.8973665185445725
1975	-0.48148104955586746
1976	5.244204721332821
1977	3.474030182999371
1978	4.243122703555386
1979	2.5708970864268537
1980	-1.0720437355973331
1981	-1.9785845400645456
1982	-0.3748246074522541
1983	2.567687083195409
1984	3.130204546376291
1985	2.7658123512492807
1986	5.4630084223563244
1987	1.9509533388000193
1988	4.005964255245416
1989	2.5637853283093364
1990	4.651864231614169
1991	3.040110078573406
1992	1.6419958051529022
1993	-2.0179465988607177
1994	2.0715713603355823
1995	1.4035024199219492
1996	0.4238197039206426
1997	0.8961429961727845
1998	2.12842170087049
1999	1.765152788371978
2000	1.278226381751253
2001	1.2684249119695181
2002	-0.4950087130921048
2003	-0.29435008189489054
2004	3.2435922548422553
2005	0.3523159474142119
2006	4.744830337276085
2007	2.9539512308175375
2008	-0.6637909534892117
2009	-3.990591851041742
2010	3.8745017395111887
2011	5.845713113015023
2012	-0.3626373655370543
2013	0.2842269140875828
2014	2.1136760250138877
2015	1.8737446797852328
2016	2.394104733744797
2017	1.8501051214330602
2018	1.0525593929444454
2019	0.642857903388176
2020	-4.803391481749017
2021	2.027832117816189