Year	% gross
1970	51.4776496887207
1971	51.6337585449219
1972	52.5918006896973
1973	53.8253707885742
1974	57.335090637207
1975	59.6372184753418
1976	60.9238891601562
1977	62.9648017883301
1978	64.4395904541016
1979	67.2001266479492
1980	70.4394607543945
1981	72.6407089233398
1982	73.1767196655273
1983	73.2566986083984
1984	72.9324722290039
1985	70.5749588012695
1986	70.6277694702148
1987	69.7643508911133
1988	68.5695495605469
1989	70.1878128051758
1990	68.0095596313477
1991	69.3721313476562
1992	67.9485015869141
1993	68.1085586547852
1994	67.9121475219727
1995	68.8225631713867
1996	68.5924835205078
1997	72.1681823730469
1998	72.328239440918
1999	72.2033233642578
2000	73.98193359375
2001	76.9516906738281
2002	79.4956893920898
2003	83.538330078125
2004	86.1884918212891
2005	90.0646133422852
2006	93.1219482421875
2007	96.4256973266602
2008	100.399108886719
2009	100.547889709473
2010	100.017990112305
2011	99.2976608276367
2012	99.9063034057617
2013	100.010559082031
2014	99.9405212402344
2015	99.5547409057617
2016	100.236618041992
2017	100.861686706543
2018	101.82347869873
2019	102.802452087402
2020	103.807739257812
2021	102.83553314209
2022	102.846389770508