Year	% gross
1991	101.595733642578
1992	102.041969299316
1993	100.358093261719
1994	100.952880859375
1995	100.793441772461
1996	100.977729797363
1997	100.213829040527
1998	102.711647033691
1999	102.710159301758
2000	102.84538269043
2001	104.609687805176
2002	104.180992126465
2003	104.272399902344
2004	104.143577575684
2005	102.934013366699
2006	102.14640045166
2007	102.25048828125
2008	102.774559020996
2009	102.228988647461
2010	101.638298034668
2011	100.502960205078
2012	99.1328735351562
2013	98.6928482055664
2014	98.5119476318359
2015	98.3121109008789
2016	97.6210403442383
2017	98.2659530639648
2018	97.0244369506836
2019	97.9945983886719
2020	99.9172286987305
2021	100.064170837402
2022	100.326721191406