Year	% gross
1971	95.0491561889648
1972	118.416999816895
1973	94.2929306030273
1977	114.735206604004
1978	116.752616882324
1979	120.655006408691
1980	122.245361328125
1981	127.309631347656
1982	133.633697509766
1983	131.807464599609
1984	127.065032958984
1985	127.477386474609
1986	122.899200439453
1987	117.028923034668
1988	115.295738220215
1989	118.796501159668
1990	115.67601776123
1991	116.894981384277
1992	116.184036254883
1993	115.655906677246
1994	115.711486816406
1995	114.598136901855
1996	114.310600280762
1997	113.421051025391
1998	111.322456359863
1999	103.118988037109
2000	101.758758544922
2001	111.939002990723
2002	103.278923034668
2003	107.126823425293
2004	106.334159851074
2005	107.156311035156
2006	103.718353271484
2007	103.005249023438
2008	106.738006591797
2009	104.637718200684
2010	108.956001281738
2011	109.445999145508
2012	105.536003112793
2013	103.458000183105
2014	110.278312683105
2015	105.146278381348
2016	107.152877807617
2017	103.945587158203
2018	106.005996704102
2019	103.677001953125
2020	102.072601318359