Year	gross (GPI)
2002	1.03237998485565
2003	0.986190021038055
2004	0.980050027370453
2005	1.07965004444122
2006	1.159019947052
2008	1.28699004650116
2012	1.39790999889374
2013	1.36251997947693
2014	1.33464002609253
2015	1.36960995197296
2016	1.288370013237
2017	1.20709002017975
2018	1.14952003955841
2019	1.16048002243042
2020	1.06749999523163
2021	1.16626000404358
2022	1.03648996353149