Year	annual % growth
1971	-11.90069205193899
1972	5.672579559991448
1973	6.046816558900602
1974	-10.17374546622871
1975	20.793434220573644
1976	11.363925531015212
1977	13.13543844259901
1978	-4.652282202064455
1979	-15.623155524004929
1980	10.703614063324224
1981	10.564799709387131
1982	2.271057335198435
1983	-15.90310314294301
1984	31.367173064289005
1985	4.669746615071716
1986	-4.807755536106882
1987	5.070974675914869
1988	4.550148385924686
1989	-11.190267972521724
1990	12.33709563985272
1991	10.95202628681919
1992	6.599146516379008
1993	-6.314849209425319
1994	-5.334949087161917
1995	7.393886480999882
1996	-0.8175674471385861
1997	6.290233867818358
1998	-4.727063582358326
1999	0.18825873533086224
2000	15.756625456625954
2001	-0.6846162579013821
2002	-10.023456237661605
2003	-5.709332904544112
2004	32.25983994099579
2005	24.90932626539424
2006	17.670695405309814
2007	14.840878932681449
2008	10.383633373625642
2009	-21.586847065973785
2010	13.576434153182902
2011	1.992475564317715
2012	1.4127555391844027
2013	-10.239082113965708
2014	-17.716752843920275