Year	annual % growth
1971	3.210216831592618
1972	8.18165588601758
1973	4.861716304850816
1974	-7.0748711004565195
1975	3.709104543133847
1976	0.7297926959232086
1977	3.72942122585782
1978	3.88789971001043
1979	-0.8899147378178185
1980	-2.4975450560214227
1981	1.5750663852868456
1982	0.266528080951403
1983	-0.40825647622710903
1984	1.1376063466158541
1985	1.717949209934062
1986	2.72344476541339
1987	3.014314772450689
1988	3.529575917097276
1989	5.479024224869718
1990	6.582472621038278
1991	-0.18249520652872775
1992	0.5083680026475577
1993	4.293593101792652
1994	4.537752964618264
1995	7.3275764636183425
1996	6.590145496547507
1997	8.457630690404855
1998	8.256439548428915
1999	5.070362507222399
2000	8.47912106995554
2001	2.409096536179419
2002	1.8613574532809025
2003	3.3153930801128126
2004	0.8867287123812417
2005	3.172045575375961
2006	1.5349005634575121
2007	1.0762929400137295
2008	-5.714044425137359
2009	-9.858588278061859
2010	0.9852171627664319
2011	-1.8011885390902194
2012	-0.8299489359166188
2013	5.754622864735978
2014	7.081863006260974
2015	4.410905375500548
2016	4.413218271658039
2017	1.7563732833094008
2018	2.5559570077714255
2019	3.6246212785921728
2020	-6.52106465232994
2021	16.340670393003194