Year	annual %
1987	4.56121675376333
1988	6.04102930276125
1989	1.18155972510728
1990	6.76141499936686
1991	1.08768075208891
1992	3.9501362118111
1993	-2.20935098982393
1994	1.25643295211918
1995	2.41533416718036
1996	3.96617900975018
1997	2.5275759165134
1998	2.88560436275085
1999	2.36218980640275
2000	0.919972032882853
2001	5.88844139785924
2002	9.5207634773538
2003	6.19272905730747
2004	7.20955025951319
2005	5.91717951149396
2006	8.88180210313141
2007	5.14420109597454
2008	5.1897081274155
2009	5.57003554490521
2010	6.25161483421796
2011	5.28335341589128
2012	4.99181362138319
2013	6.39435969639548
2014	6.88819578125575
2015	4.7414618115684
2016	1.69780164375845
2017	2.09651968875373