Year	gross (GPI)
2000	1.24091994762421
2001	1.22073996067047
2002	1.24829995632172
2003	1.2411299943924
2004	1.25975000858307
2005	1.31326997280121
2006	1.27766001224518
2007	1.27922999858856
2008	1.3082799911499
2009	1.28034996986389
2010	1.25161004066467
2011	1.25864005088806
2012	1.24076998233795
2013	1.22581005096436
2014	1.2108199596405
2015	1.23232996463776
2016	1.24266004562378
2017	1.21740996837616
2018	1.23283994197845
2019	1.2430100440979
2020	1.26961994171143
2021	1.28446996212006
2022	1.30130004882812