Year	% gross
1973	92.9413986206055
1974	92.3764038085938
1975	92.0389099121094
1976	92.1706924438477
1977	85.1659393310547
1978	87.4520416259766
1979	86.7064666748047
1980	86.3645095825195
1981	85.9616165161133
1982	85.6304168701172
1983	85.1870880126953
1984	84.7749328613281
1985	84.512077331543
1986	84.6126708984375
1987	84.9963836669922
1988	85.4771423339844
1989	86.5127334594727
1990	87.947998046875
1991	88.8101501464844
1992	90.0445404052734
1993	93.5549011230469
1994	93.2340774536133
1995	95.1112594604492
1996	97.1558303833008
1998	103.863021850586
1999	103.919708251953
2000	104.341758728027
2001	103.860038757324
2002	103.766448974609
2003	103.95329284668
2004	103.848411560059
2005	103.665260314941
2006	103.939117431641
2007	103.781982421875
2008	103.940483093262
2009	103.554847717285
2010	103.322357177734
2011	101.956008911133
2012	101.662452697754
2013	102.166778564453
2014	102.32544708252
2015	101.936080932617
2016	101.663467407227
2017	101.643341064453
2018	101.665603637695
2019	101.509658813477
2020	101.568092346191
2021	101.366889953613
2022	101.311798095703