Year	gross (GPI)
1970	0.0504699982702732
1971	0.231250002980232
1972	0.163460001349449
1973	0.191389992833138
1974	0.188010007143021
1975	0.162039995193481
1976	0.210120007395744
1977	0.334879994392395
1978	0.3612399995327
1979	0.380950003862381
1980	0.4548200070858
1981	0.428020000457764
1982	0.35291999578476
1983	0.440820008516312
1984	0.391609996557236
1985	0.596979975700378
1986	0.522069990634918
1987	0.649749994277954
1988	0.530399978160858
1989	0.554409980773926
1990	0.612410008907318
1991	0.752789974212646
1994	0.859130024909973
1995	1.01048994064331
1997	0.853479981422424
1999	0.815379977226257
2000	0.856610000133514
2001	1.20122003555298
2002	0.988940000534058
2003	0.928810000419617
2004	0.970659971237183
2005	1.03331995010376
2006	1.01007997989655
2007	1.14951002597809
2008	1.19296002388
2009	1.1651200056076
2010	1.18418002128601
2011	1.23547005653381
2012	1.24836003780365
2013	1.18438994884491
2014	1.18191003799438
2015	1.22874999046326
2016	1.22152996063232
2017	1.28829002380371
2018	1.28866004943848
2019	1.28647005558014
2020	1.32422995567322
2021	1.33415997028351
2022	1.2641099691391