Year	gross (GPI)
1974	0.463880002498627
1975	0.533119976520538
1976	0.506609976291656
1977	0.516189992427826
1978	0.42833998799324
1979	0.332769989967346
1980	0.332430005073547
1994	0.525569975376129
2003	0.832880020141602
2004	0.894029974937439
2005	0.914690017700195
2006	0.959500014781952
2007	0.996689975261688
2008	1.03743004798889
2009	1.05973994731903
2010	1.08205997943878
2011	1.10389995574951
2012	1.11684000492096
2013	1.13402998447418
2014	1.15319001674652
2015	1.1701899766922
2016	1.18367004394531
2017	1.18761003017426
2018	1.19551002979279
2019	1.19866001605988
2020	1.18023002147675
2021	1.16430997848511
2022	1.14534997940063