Year	gross (GPI)
1970	0.726809978485107
1971	0.72776997089386
1972	0.728600025177002
1973	0.742649972438812
1974	0.762319982051849
1975	0.770110011100769
1976	0.778180003166199
1977	0.794009983539581
1978	0.809300005435944
1979	0.814779996871948
1980	0.818220019340515
1981	0.836030006408691
1982	0.85547000169754
1983	0.871110022068024
1984	0.889389991760254
1985	0.89819997549057
1986	0.915149986743927
1987	0.926630020141602
1988	0.940289974212646
1989	0.958000004291534
1990	0.975709974765778
1991	0.982710003852844
1992	1.01365995407104
1993	1.03294003009796
1994	1.04946005344391
1995	1.0836900472641
1996	1.10671997070312
1997	1.12777996063232
1998	1.13960003852844
1999	1.14125001430511
2000	1.14522004127502
2001	1.15280997753143
2002	1.16393995285034
2003	1.1659300327301
2004	1.17166996002197
2005	1.17721998691559
2006	1.18464994430542
2007	1.18963003158569
2008	1.19424998760223
2009	1.19675004482269
2010	1.19848001003265
2011	1.1983300447464
2012	1.19210004806519
2013	1.18833005428314
2014	1.18336999416351
2015	1.1773099899292
2016	1.18506002426147
2017	1.18739998340607
2018	1.19214999675751
2019	1.1947900056839
2020	1.20130002498627
2021	1.21229994297028
2022	1.21008002758026