Year	gross (GPI)
1994	1.23655998706818
1998	1.11310994625092
1999	1.12959003448486
2000	1.12872004508972
2001	1.14866995811462
2002	1.16165995597839
2003	1.17690002918243
2004	1.18251001834869
2005	1.18631994724274
2006	1.18918001651764
2007	1.19420003890991
2008	1.20017004013062
2009	1.21317994594574
2010	1.20358002185822
2011	1.15343999862671
2012	1.13002002239227
2013	1.16531002521515
2014	1.14013004302979
2015	1.14066004753113
2016	1.12173998355865
2017	1.12216997146606
2018	1.11242997646332
2019	1.11880004405975
2020	1.09394001960754
2021	1.11470997333527