Year	gross (GPI)
1998	1.23148000240326
1999	1.23258996009827
2000	1.22247004508972
2002	1.2075799703598
2004	1.17223000526428
2005	1.19475996494293
2007	1.20334994792938
2008	1.18590998649597
2009	1.13059997558594
2010	1.12446999549866
2011	1.12890994548798
2012	1.11872005462646
2013	1.11445999145508
2014	1.10497999191284
2015	1.10018002986908
2016	1.09335994720459
2017	1.08494997024536
2018	1.07820999622345
2019	1.08633005619049
2020	1.0854400396347
2021	1.09630000591278