Year	gross (GPI)
1970	0.327199995517731
1972	0.385549992322922
1976	0.39640998840332
1982	0.461870014667511
1983	0.481119990348816
1984	0.461750000715256
1985	0.486570000648499
1993	0.668290019035339
1995	0.637950003147125
1996	0.550870001316071
1999	0.845939993858337
2000	0.897279977798462
2001	0.778620004653931
2002	0.883889973163605
2003	0.816810011863708
2004	0.815810024738312
2006	0.940869987010956
2007	1.0220400094986
2008	0.94980001449585
2009	0.99084997177124
2010	0.921980023384094
2011	0.901489973068237
2012	1.08235001564026
2013	1.13372004032135
2014	1.1308399438858
2015	1.11837995052338
2016	1.12885999679565
2017	1.13438999652863
2018	1.13780999183655
2019	1.11001920700073
2020	1.13140940666199
2021	1.15243148803711
2022	1.18024003505707