Year	gross (GPI)
1970	0.436679989099503
1971	0.445410013198853
1972	0.452609986066818
1973	0.457309991121292
1974	0.466910004615784
1975	0.477470010519028
1976	0.484360009431839
1977	0.500999987125397
1978	0.517229974269867
1979	0.538230001926422
1980	0.547680020332336
1981	0.565429985523224
1982	0.590300023555756
1983	0.591359972953796
1984	0.596939980983734
1985	0.618340015411377
1986	0.619960010051727
1987	0.630140006542206
1988	0.665019989013672
1989	0.678709983825684
1990	0.689260005950928
1991	0.712130010128021
1992	0.724420011043549
1993	0.742500007152557
1994	0.757139980792999
1995	0.772560000419617
1996	0.777050018310547
1997	0.794700026512146
1998	0.828509986400604
1999	0.851300001144409
2000	0.861360013484955
2001	0.859799981117249
2002	0.890120029449463
2003	0.884389996528625
2004	0.876559972763062
2005	0.907299995422363
2006	0.92849999666214
2007	0.919659972190857
2008	0.926010012626648
2009	0.922730028629303
2010	0.917379975318909
2011	0.929329991340637
2012	0.974789977073669
2013	1.01397001743317
2014	1.03351998329163
2015	1.03261005878448
2016	1.0442099571228
2017	1.05410003662109
2018	1.0689799785614
2019	1.09066998958588
2020	1.10319995880127
2021	1.10549998283386
2022	1.0950700044632