Year	gross (GPI)
2011	1.71288001537323
2012	1.7294100522995
2013	1.59652996063232
2014	1.64824998378754
2015	1.57552003860474
2016	1.50657999515533
2017	1.60257005691528
2018	1.5628399848938
2019	1.59783005714417
2020	1.63182997703552
2021	1.76092994213104
2022	1.49224996566772