Year	annual % growth
1972	9.03292290889564
1973	4.89520442691638
1974	1.89565769729334
1975	6.24677740180313
1976	1.81869519376208
1977	4.37478488562751
1978	6.84649956595693
1979	6.20655202586089
1980	1.75888725280005
1981	1.48121081691231
1982	2.6635958430419
1983	10.970294576599
1984	7.26877017164045
1985	-0.787266947764593
1986	0.533629526928308
1987	4.39963027403032
1988	11.0734190326584
1989	7.4781850129918
1990	7.26433670915938
1991	4.91296391064415
1992	3.19452461274243
1993	5.85077156789767
1994	11.4583106332359
1995	7.77622854308302
1996	1.5359494310584
1997	7.24691222781162
1998	-8.38332480341747
1999	2.75572235372795
2000	10.9680132635297
2001	-6.45369062773977
2002	1.6946990530062
2003	3.79666370075242
2004	6.69705166677439
2005	7.48277114288263
2006	9.92746284022456
2007	6.04160102066673
2008	-11.5033936858689
2009	-3.6775842299417
2010	22.3936744933412
2011	0.837726965116985
2012	-2.01064747656289
2013	1.93266708163576
2014	2.70948026805387
2015	2.57762466531959
2016	-0.602350117165358
2017	5.40635047927201