Year	% gross
1970	39.2388687133789
1971	40.3274192810059
1972	41.9535484313965
1973	43.5186195373535
1974	46.1682090759277
1975	48.1657981872559
1976	50.0798492431641
1977	55.155101776123
1978	60.6331596374512
1979	66.2965774536133
1980	69.0904388427734
1981	71.2510604858398
1982	73.4293212890625
1983	72.9592895507812
1984	72.4405517578125
1985	69.8657073974609
1986	67.5564880371094
1987	66.3042221069336
1988	64.523323059082
1989	64.3253479003906
1990	63.6453514099121
1991	65.2223281860352
1992	65.0784530639648
1993	66.2772598266602
1994	66.6237564086914
1995	66.7825012207031
1996	64.2643585205078
1997	68.1671524047852
1998	68.7186584472656
1999	69.8706665039062
2000	72.1333618164062
2001	74.1663818359375
2002	77.8774032592773
2003	81.9530181884766
2004	83.7765579223633
2005	85.8466186523438
2006	87.936393737793
2007	88.4176712036133
2008	89.5523071289062
2009	90.4901275634766
2010	91.0502014160156
2011	92.18115234375
2012	94.0065002441406
2013	94.5466079711914
2014	93.9035720825195
2015	92.7433319091797
2016	92.2144927978516
2017	92.7696075439453
2018	93.514289855957
2019	94.4751586914062
2020	95.2485198974609
2021	95.7599029541016
2022	95.884651184082