Year	gross (GPI)
1970	0.638300001621246
1971	0.644919991493225
1972	0.655680000782013
1973	0.684939980506897
1974	0.706910014152527
1975	0.724349975585938
1976	0.729430019855499
1977	0.767390012741089
1978	0.790799975395203
1979	0.81318998336792
1980	0.832350015640259
1981	0.850340008735657
1982	0.860700011253357
1983	0.869229972362518
1984	0.879630029201508
1985	0.89122998714447
1986	0.902369976043701
1987	0.917580008506775
1988	0.935649991035461
1989	0.95687997341156
1990	0.989690005779266
1991	0.998340010643005
1992	1.02084994316101
1993	1.02809000015259
1994	1.03680002689362
1995	1.05505001544952
1996	1.05991005897522
1997	1.06515002250671
1998	1.07128000259399
1999	1.07678997516632
2000	1.081169962883
2001	1.09240996837616
2002	1.1061600446701
2003	1.11556005477905
2004	1.12504005432129
2005	1.13511002063751
2006	1.13926994800568
2007	1.14219999313354
2008	1.14303004741669
2009	1.14551997184753
2010	1.14603996276855
2011	1.14823997020721
2012	1.14880001544952
2013	1.14719998836517
2014	1.14429998397827
2015	1.14459002017975
2016	1.1431200504303
2017	1.14824998378754
2018	1.1528400182724
2019	1.16278994083405
2020	1.17597997188568
2021	1.19406998157501
2022	1.19631004333496