Year	gross (GPI)
1984	0.517579972743988
1985	0.35495999455452
1987	0.38604000210762
2000	0.541750013828278
2001	0.534820020198822
2002	0.534409999847412
2004	0.598160028457642
2005	0.592689990997314
2009	0.698450028896332
2015	0.699150025844574
2016	0.682569980621338
2017	0.717939972877502
2018	0.707701742649078
2019	0.688640415668488
2020	0.688187956809998
2021	0.695644795894623
2022	0.780676245689392