Year	gross (GPI)
1971	0.20974999666214
1972	0.197909995913506
1977	0.252350002527237
1978	0.238609999418259
1980	0.231069996953011
1981	0.225620001554489
1982	0.226940006017685
1984	0.253809988498688
1985	0.261909991502762
1992	0.32328000664711
2006	0.458299994468689
2007	0.524930000305176
2008	0.540700018405914
2009	0.581430017948151
2010	0.589290022850037
2011	0.584429979324341
2012	0.585449993610382
2013	0.587249994277954
2014	0.594349980354309
2015	0.603070020675659
2016	0.599979996681213
2017	0.6076700091362
2018	0.683369994163513
2019	0.756099998950958
2020	0.787230014801025
2021	0.919579982757568
2022	0.972779989242554