Year	gross (GPI)
1999	1.17630004882812
2000	1.25109994411469
2001	1.20351004600525
2002	1.21979999542236
2003	1.19841003417969
2004	1.17502999305725
2005	1.1635799407959
2006	1.19623005390167
2007	1.18751001358032
2008	1.10979998111725
2009	1.13554000854492
2010	1.15631997585297
2011	1.04948997497559
2012	1.11247003078461
2013	1.1007000207901
2014	1.0557199716568
2015	1.01068997383118