Year	gross (GPI)
1983	0.261799991130829
1989	0.265810012817383
1990	0.316289991140366
1991	0.329270005226135
2000	0.394919991493225
2002	0.267309993505478
2003	0.322970002889633
2004	0.379119992256165
2005	0.572070002555847
2006	0.540840029716492
2008	0.605509996414185
2009	0.596270024776459
2010	0.616119980812073
2011	0.640160024166107
2013	0.802309989929199
2015	0.937619984149933
2016	0.965489983558655
2017	1.00671994686127
2018	1.07298994064331
2019	1.06323003768921
2020	1.04937994480133
2021	1.10930716991425
2022	1.11093878746033