Year	% gross
1971	122.546028137207
1972	122.278869628906
1973	122.724906921387
1974	125.293167114258
1975	126.879898071289
1976	124.893951416016
1977	122.142562866211
1978	120.101699829102
1979	117.908348083496
1981	95.7478179931641
1982	96.0855484008789
1983	96.9727401733398
1984	95.9763565063477
1985	96.1872024536133
1986	97.1640701293945
1987	98.0848388671875
1988	98.1964569091797
1989	100.292556762695
1990	100.203086853027
1991	99.4855117797852
1992	107.32568359375
1993	99.6821899414062
1994	102.284332275391
1995	102.815979003906
1996	104.141227722168
1997	101.782707214355
1998	102.889610290527
1999	102.698303222656
2000	103.081970214844
2001	103.936698913574
2002	105.345230102539
2003	105.53524017334
2004	105.720321655273
2005	105.960090637207
2006	103.821449279785
2007	103.064392089844
2008	101.912338256836
2009	101.346260070801
2010	100.930061340332
2011	100.085891723633
2012	99.3832473754883
2013	98.9433822631836
2014	97.6784210205078
2015	97.0862579345703
2016	96.9349136352539
2017	97.3073883056641
2018	98.2688369750977
2019	99.2505722045898
2020	99.6399383544922
2021	99.7637176513672