Year	gross (GPI)
1992	0.430159986019135
1993	1.20002996921539
1994	1.02061998844147
1996	0.882239997386932
1997	0.788139998912811
1999	1.03161001205444
2000	0.879289984703064
2001	0.715200006961823
2002	0.801090002059937
2003	0.693319976329803
2004	0.813750028610229
2005	0.720679998397827
2006	0.671880006790161
2007	0.684989988803864
2008	0.675339996814728
2009	0.694180011749268
2010	0.687619984149933
2011	0.673449993133545