Year	gross (GPI)
1990	0.159740000963211
1992	0.369919985532761
1999	0.717459976673126
2000	0.683849990367889
2003	0.696399986743927
2009	0.635429978370667
2010	0.68190997838974
2011	0.741439998149872
2012	0.836199998855591
2013	0.851379990577698
2014	0.801199972629547