Year	annual % growth
1971	6.7408494214044055
1972	3.1827893278782113
1973	1.9583299863876675
1974	-0.3249933832097014
1975	7.619664500003466
1976	4.43073837488474
1977	7.828405979829682
1978	6.0186976426229535
1979	0.3810434323944918
1980	-5.468635410842495
1981	18.500053696469138
1982	7.975107841280902
1983	4.804250312411028
1984	7.1686935188234315
1985	2.4252219287935333
1986	-5.434425836286181
1987	-1.8551927669966375
1988	3.898664341034234
1989	-0.12108311456422882
1990	-1.3226351547601922
1991	-11.137898216638249
1992	-17.359522393827405
1993	-12.842340346640128
1994	0.6148426476911766
1995	-1.9637708126579128
1996	6.553589283131899
1997	1.8956917602667858
1998	-1.2090166705078502
1999	4.9865688746372
2000	2.1692479355404686
2001	3.8734273505755255
2002	1.9999967269984609
2003	5.7131256783909095
2004	5.446441143326169
2005	9.291107330141557
2006	13.717064010049882
2007	3.3115044193815777
2008	-2.2776169370468153
2009	3.5091505123465936
2010	7.173738121687904
2011	0.3328771026218931
2012	5.057992787460492
2013	2.830101742507395
2014	2.746243766023454
2015	5.100113309279379
2016	3.3432899030797074
2017	1.5112758842147969
2018	1.0377132088425327
2019	0.3944395624423862