Year	gross (GPI)
1971	1.15935003757477
1981	1.24346005916595
1986	1.27822995185852
1991	1.19605994224548
1992	1.1841299533844
1993	1.18216001987457
2001	1.23206996917725
2002	1.25973999500275
2003	1.23237001895905
2004	1.26277005672455
2005	1.25901997089386
2006	1.25116002559662
2007	1.24506998062134
2008	1.25019001960754
2009	1.25276005268097
2011	1.24776005744934
2012	1.21097004413605
2013	1.18903994560242
2014	1.16541004180908
2015	1.16781997680664
2016	1.15582001209259
2017	1.15702998638153
2018	1.15128004550934
2019	1.14449000358582
2020	1.12750005722046
2021	1.11937999725342
2022	1.0764399766922