Year	gross (GPI)
1970	0.722909986972809
1971	0.724039971828461
1972	0.729200005531311
1973	0.743740022182465
1974	0.756099998950958
1975	0.767599999904633
1976	0.769810020923615
1977	0.795069992542267
1978	0.806930005550385
1979	0.815460026264191
1980	0.820930004119873
1981	0.822470009326935
1982	0.833620011806488
1983	0.83364999294281
1984	0.834630012512207
1985	0.840390026569366
1986	0.83840000629425
1987	0.842599987983704
1988	0.861320018768311
1989	0.872759997844696
1990	0.89095002412796
1991	0.900829970836639
1992	0.919030010700226
1993	0.930850028991699
1994	0.935350000858307
1995	0.946720004081726
1996	0.951349973678589
1997	0.962740004062653
1998	0.974810004234314
1999	0.989859998226166
2000	0.998539984226227
2001	1.00401997566223
2002	1.0234899520874
2003	1.02505004405975
2004	1.03472995758057
2005	1.04639005661011
2006	1.0613499879837
2007	1.06529998779297
2008	1.07049000263214
2009	1.07253003120422
2010	1.07098996639252
2011	1.07018005847931
2012	1.08217000961304
2013	1.09579002857208
2014	1.10209000110626
2015	1.10260999202728
2016	1.11019003391266
2017	1.11432003974915
2018	1.12161004543304
2019	1.13157999515533
2020	1.13443005084991
2021	1.13513004779816
2022	1.12603998184204