Year	gross (GPI)
1970	0.634549975395203
1971	0.630420029163361
1972	0.64367002248764
1975	0.829609990119934
1976	0.747829973697662
1977	0.731719970703125
1978	0.733110010623932
1979	0.662490010261536
1980	0.768109977245331
1983	0.742860019207001
1984	0.75669002532959
1985	0.776719987392426
1986	0.796320021152496
1987	0.814069986343384
1993	0.85547000169754
1994	0.866360008716583
1995	0.864199995994568
1996	0.857169985771179
1997	0.87813001871109
1998	0.880230009555817
1999	0.918439984321594
2000	0.916450023651123
2002	0.931150019168854
2003	0.944050014019012
2004	0.950299978256226
2005	0.956709980964661
2006	0.9966099858284
2007	1.0075900554657
2008	1.02783000469208
2009	1.05808997154236
2010	1.06902003288269
2011	1.09080994129181
2012	1.10623002052307
2013	1.100909948349
2014	1.10432994365692
2015	1.10243999958038
2016	1.11484003067017
2017	1.13011002540588
2018	1.14221000671387
2019	1.14408004283905
2020	1.15575003623962
2021	1.18094003200531
2022	1.16952002048492