Year	annual % growth
1974	-27.79088591658892
1975	30.068397920806717
1976	34.15058526974852
1977	28.981712057703618
1978	-3.74492847399722
1979	-22.60777311301385
1980	-1.0869799048587652
1981	11.538448506108324
1982	16.625626935063266
1983	-52.798313446143815
1984	54.33781531860973
1985	-3.70202262196905
1986	-0.3913617405111296
1987	8.492600760563576
1988	15.015004151278703
1989	-29.43506565166524
1990	-5.661672132684032
1991	49.61797126415476
1992	26.237461911013
1993	-6.5331711508335815
1994	-18.474665951916762
1995	23.87850227728285
1996	-11.230152844143419
1997	52.01891967602754
1998	11.272017794681034
1999	-9.330903833274732
2000	12.399347223447847
2001	14.107650263922551
2002	-25.216559743034665
2003	-20.883916321521383
2004	57.66691364659226
2005	35.159528928121944
2006	34.75219594478949
2007	33.00625980321627
2008	1.361805726921034
2009	-19.557347334409627
2010	-2.8908223611483663
2011	15.393357909245225
2012	24.395552460379506
2013	-9.6873131409817
2014	-18.53211199427959