Year	% gross
1971	101.879577636719
1972	103.615463256836
1973	105.350479125977
1974	107.86792755127
1975	107.167510986328
1976	108.876991271973
1977	112.741569519043
1978	113.50959777832
1979	119.238822937012
1980	121.210968017578
1981	123.098602294922
1982	123.571662902832
1983	123.492340087891
1984	123.310913085938
1985	121.290168762207
1986	120.24430847168
1987	119.04280090332
1988	117.16886138916
1989	116.595252990723
1990	115.681137084961
1991	114.768417358398
1992	114.321083068848
1993	113.895523071289
1994	113.512878417969
1995	113.463119506836
1996	112.735969543457
1997	111.685478210449
1998	110.51586151123
1999	109.927383422852
2000	109.118301391602
2001	109.028007507324
2002	109.220031738281
2003	109.264152526855
2004	108.834548950195
2005	108.534042358398
2006	108.129272460938
2007	108.726860046387
2008	109.446380615234
2009	110.722198486328
2010	110.995216369629
2011	111.058860778809
2012	111.073516845703
2013	110.109268188477
2014	108.573143005371
2015	106.963432312012
2016	106.391220092773
2017	105.797607421875
2018	105.188163757324
2019	105.095039367676
2020	104.517730712891
2021	103.358810424805
2022	102.004783630371