Year	% gross
1978	91.7755279541016
1979	92.4780578613281
1980	92.9339370727539
1981	93.119743347168
1982	93.2096099853516
1983	93.9997787475586
1984	95.718017578125
1985	96.4326477050781
1986	96.8006591796875
1987	97.1718597412109
1988	97.6188125610352
1989	98.1063690185547
1990	98.9223785400391
1991	99.1365203857422
1992	100.747276306152
1993	100.746276855469
1994	101.712356567383
1995	100.889610290527
1996	99.6031265258789
1998	94.7283401489258
1999	94.7928085327148
2000	94.5499114990234
2001	94.758171081543
2002	93.588623046875
2003	93.3511962890625
2004	93.2228698730469
2005	93.8099594116211
2006	94.1694793701172
2007	95.0716171264648
2008	95.5135726928711
2009	95.8478317260742
2010	96.6068572998047
2011	97.1951599121094
2012	98.3727416992188
2013	101.221382141113
2015	103.913391113281
2016	104.09513092041
2017	103.900062561035
2018	104.188026428223
2019	104.071113586426
2020	104.211616516113
2021	103.605186462402
2022	103.392356872559