Year	annual %
1991	11.26508184726626
1992	20.850853135383744
1993	31.13650427842861
1994	32.47915124197577
1995	50.71959014621492
1996	8.055419617961256
1997	11.186492704502268
1998	11.805640109222045
1999	13.787483198481334
2000	25.252299863613047
2001	18.762500454948984
2002	17.499672482411274
2003	19.650050051027186
2004	14.572770636513374
2005	14.399447740669538
2006	26.09762253475758
2007	16.999495828068024
2008	13.224070515981312
2009	12.808923175745534
2010	11.773456682242815
2011	0.403483208781233
2012	22.007273008710666
2013	13.731008622930476