Year	gross (GPI)
2001	1.17401003837585
2002	1.19423997402191
2003	1.23304998874664
2004	1.23991000652313
2005	1.22971999645233
2006	1.22427999973297
2007	1.22518002986908
2008	1.2304300069809
2009	1.22696995735168
2010	1.23011004924774
2011	1.24047005176544
2012	1.24483001232147
2013	1.24814999103546
2014	1.23605000972748
2015	1.25143003463745
2016	1.23961997032166
2017	1.26119005680084
2018	1.27599000930786
2019	1.28032994270325
2020	1.28644001483917
2021	1.29992997646332
2022	1.31497001647949