Year	gross (GPI)
1999	1.05887997150421
2000	1.03342998027802
2001	1.04673004150391
2002	1.05376994609833
2003	1.04816997051239
2004	0.999769985675812
2005	1.00364005565643
2006	0.988430023193359
2007	1.02982997894287
2008	1.07120001316071
2009	1.04987001419067
2010	1.05181002616882
2011	1.05606997013092
2012	1.01760005950928