Year	% gross
1971	118.161117553711
1972	115.35652923584
1973	112.894561767578
1974	112.079971313477
1975	111.659111022949
1976	110.703056335449
1977	109.969871520996
1978	110.288688659668
1979	109.619812011719
1980	109.049606323242
1981	108.82657623291
1982	109.596290588379
1983	110.055450439453
1984	110.500679016113
1985	110.001342773438
1986	110.97038269043
1987	109.596672058105
1988	108.323593139648
1989	107.802558898926
1990	107.549102783203
1991	107.553421020508
1992	107.764709472656
1993	107.537490844727
1994	109.019523620605
1995	108.47004699707
1996	108.281631469727
1997	106.844192504883
1998	106.687553405762
1999	106.357803344727
2000	100.428260803223
2001	100.382209777832
2002	100.249298095703
2003	99.9754486083984
2004	99.8111801147461
2005	104.636489868164
2006	104.278846740723
2007	103.85977935791
2008	103.622146606445
2009	103.041137695312
2010	102.761512756348
2011	102.691101074219
2012	102.523162841797
2013	102.276443481445
2014	101.280349731445
2015	101.989639282227
2016	102.260429382324
2017	102.417221069336
2018	102.464408874512
2019	102.447647094727
2020	102.732612609863
2021	102.744186401367
2022	102.696418762207