Year	% gross
1971	84.4908981323242
1972	74.8152923583984
1973	86.0155792236328
1974	82.6489791870117
1975	83.3076705932617
1976	83.1142578125
1977	82.8672485351562
1978	84.7521591186523
1979	88.0490036010742
1980	88.908576965332
1981	89.2681884765625
1982	89.3245086669922
1983	89.8242416381836
1984	90.9402770996094
1985	90.6104736328125
1987	92.81884765625
1988	93.1073608398438
1989	92.5752563476562
1990	92.5697479248047
1991	93.4056396484375
1992	95.4219131469727
1993	131.006103515625
1994	137.094116210938
1995	142.086853027344
1996	147.201034545898
1997	152.159332275391
1998	173.355255126953
1999	174.98454284668
2000	170.504318237305
2001	165.631896972656
2002	158.776672363281
2003	148.485015869141
2004	103.179138183594
2005	101.34204864502
2006	101.008438110352
2007	100.787086486816
2008	101.293617248535
2009	101.153099060059
2010	101.71981048584
2011	101.528671264648
2012	102.479888916016
2013	141.469116210938
2014	142.575439453125
2015	146.889114379883
2016	145.599060058594
2017	148.528549194336
2018	147.598724365234
2019	142.982864379883
2020	143.369766235352
2021	146.834045410156
2022	148.988021850586