Year	annual % growth
1971	12.57064553881078
1972	2.8972064779396476
1973	-7.61015588678498
1974	-12.585973799681298
1975	-21.76330390399677
1976	7.584425565594799
1977	12.995243694258434
1978	7.311995139083919
1979	9.087571986356949
1980	5.981192919932994
1981	6.22738406385983
1982	9.593919056705218
1983	-27.8235703087483
1984	-4.213544815044827
1985	-1.8311512831634502
1986	9.295043402695029
1987	11.602764222326911
1988	10.278681203640133
1989	8.534228894336792
1990	4.865823008693255
1991	13.093783401439055
1992	13.450483898511138
1993	7.271245406534305
1994	7.9208695125673785
1995	14.24413001548605
1996	6.944107751937409
1997	7.980367802400707
1998	5.9552726163716585
1999	-1.0732851691176535
2000	3.7219952729264207
2001	3.9415635315818776
2002	3.2318178385452256
2003	4.374324334878324
2004	6.06126745031132
2005	8.865799912403375
2006	4.22117522853749
2007	8.279147213609605
2008	1.7070009243400648
2009	4.2313342745844835
2010	11.234036578464
2011	2.977719659306871
2012	10.832245860434853
2013	4.733065914307815
2014	1.5896873084904541
2015	5.750245036900353
2016	-0.2795881254579342
2017	1.0238770985415897
2018	0.964491854535666
2019	2.907143803208868
2020	-9.359729781988861
2021	6.227921601838091