Year	annual %
1991	11.9935811151592
1992	13.1717453439967
1993	16.3759078637702
1994	20.7843644356508
1995	45.7433427627653
1996	36.7700878974732
1997	13.2904926919581
1998	-8.34295175004308
1999	33.4609053609904
2000	23.3460519238341
2001	2.74820045370649
2002	8.71188048361509
2003	10.8923428389302
2004	14.1133199884498
2005	18.5333535518157
2006	13.588647275421
2007	10.8882824348502
2008	20.377746235765
2009	-8.70527002029664
2010	23.6162920182449
2011	18.1136666696716
2012	5.89315892251292
2013	9.20895704915077
2014	7.16332422002795
2015	46.4762512255778
2016	0.134410844260984
2017	18.5535661652076
2018	14.8536647661831