Year	gross (GPI)
1970	0.525799989700317
1971	0.572669982910156
1972	0.626399993896484
1973	0.637860000133514
1974	0.665289998054504
1975	0.683619976043701
1976	0.681980013847351
1977	0.691380023956299
1978	0.708369970321655
1979	0.72205001115799
1980	0.735570013523102
1981	0.758620023727417
1982	0.781560003757477
1983	0.807850003242493
1984	0.820680022239685
1985	0.839810013771057
1986	0.854290008544922
1987	0.875850021839142
1988	0.88766998052597
1989	0.922209978103638
1990	0.947849988937378
1991	0.957379996776581
1992	0.979030013084412
1993	1.00841999053955
1994	1.02987003326416
1995	1.05576002597809
1996	1.08438003063202
1997	1.1088000535965
1998	1.11289000511169
1999	1.13276994228363
2000	1.14028000831604
2001	1.14350998401642
2002	1.16228997707367
2003	1.17129004001617
2004	1.16974997520447
2005	1.16979002952576
2006	1.18307995796204
2007	1.19152998924255
2008	1.18470001220703
2009	1.20243000984192
2010	1.20149004459381
2011	1.20406997203827
2012	1.20518004894257
2013	1.20784997940063
2014	1.21019005775452
2015	1.20783996582031
2016	1.21072995662689
2017	1.21460998058319
2018	1.21975004673004
2019	1.22743999958038
2020	1.2477799654007
2021	1.27034997940063
2022	1.26670002937317