Year	gross (GPI)
1999	0.836099982261658
2000	0.852209985256195
2001	0.827019989490509
2002	0.819459974765778
2003	0.790690004825592
2004	0.803470015525818
2005	0.71408998966217
2006	0.719449996948242
2007	0.722790002822876
2008	0.692139983177185
2009	0.710359990596771
2010	0.655101478099823
2011	0.655489265918732
2012	0.605128228664398
2013	0.600316286087036
2014	0.621613502502441
2015	0.62827742099762
2016	0.640822649002075
2017	0.644664347171783
2018	0.695542871952057
2019	0.730714321136475
2020	0.881362795829773
2021	0.866226494312286
2022	0.872060894966125
2023	0.940059900283813