Year	annual % growth
1972	3.45137618016993
1973	13.8646746227793
1974	2.68750514819851
1975	2.32531826858629
1976	9.95761272430653
1977	11.5148629311347
1978	12.3479893903051
1979	2.99077709554668
1980	0.0468671255079158
1981	4.70087209682022
1982	3.38447770584878
1983	6.93039675332028
1984	5.86450082321089
1985	1.54853990634017
1986	3.84296600933752
1987	11.7308831681908
1988	14.9744053337386
1989	11.975435486174
1990	9.13988869069769
1991	8.87992941008125
1992	8.86115434201153
1993	10.9201580821746
1994	7.24447269204983
1995	8.25646315026513
1996	3.35515344343995
1997	-7.7710948034034
1998	-14.2060939226867
1999	4.27491731995869
2000	2.63948884182462
2001	-0.305686045896607
2002	9.26175636155256
2003	6.89319319379624
2004	6.78739436573063
2005	3.08433883704092
2006	6.21841947136342
2007	6.38024714028344
2008	-1.88740403088826
2009	1.22845487697951
2010	7.56857255837504
2011	0.516592187157428
2012	2.64932769677422
2013	0.585713568116859
2014	1.21975747709497
2015	6.29664626175281
2016	4.01958584552926
2017	3.42665968857186