Year	% gross
1976	107.733299255371
1978	102.675048828125
1979	100.689338684082
1980	97.4446792602539
1981	95.9869766235352
1982	95.4044876098633
1983	95.2285919189453
1984	96.8741683959961
1985	98.0063705444336
1986	99.2093200683594
1987	98.8393173217773
1988	98.4175872802734
1989	99.1229476928711
1990	99.3725967407227
1991	100.645713806152
1992	99.0358963012695
1993	98.0643310546875
1994	101.12287902832
1995	104.104759216309
1996	107.015243530273
1997	109.209136962891
1998	109.649749755859
1999	109.397300720215
2000	109.125343322754
2001	108.75528717041
2002	107.709121704102
2003	107.269111633301
2004	106.634773254395
2005	111.322402954102
2006	109.894897460938
2007	109.893409729004
2008	110.683570861816
2009	108.076110839844
2010	108.49446105957
2011	109.736122131348
2012	110.606300354004
2013	110.929107666016
2014	114.043319702148
2015	113.30313873291
2016	110.957733154297
2017	109.716163635254
2018	107.403678894043
2019	104.310256958008
2020	100.61360168457
2021	97.6049499511719
2022	95.6067123413086