Year	% gross
1970	27.3310699462891
1971	27.5593891143799
1972	28.8797302246094
1973	29.7729206085205
1974	30.2834796905518
1975	31.8763809204102
1976	33.7167587280273
1977	33.6906509399414
1978	34.4656791687012
1979	34.3253593444824
1980	34.8998718261719
1981	35.7341690063477
1982	36.490291595459
1983	37.0733108520508
1984	37.7160911560059
1985	38.3553085327148
1986	38.888240814209
1987	39.8241004943848
1988	40.9350814819336
1989	41.9900512695312
1990	43.1914596557617
1991	44.5993614196777
1992	46.7467613220215
1993	49.4776382446289
1994	51.8089790344238
1995	53.697681427002
1996	55.2329216003418
1997	56.3750114440918
1998	55.8232307434082
1999	57.614559173584
2000	58.9213600158691
2001	60.7479400634766
2002	62.8087005615234
2003	64.8589096069336
2004	66.8679885864258
2005	68.6715393066406
2006	70.3347625732422
2007	71.6743698120117
2008	72.6951904296875
2009	73.7652435302734
2010	74.6598892211914
2011	75.7978668212891
2012	76.3838195800781
2013	76.8018035888672
2014	77.3534698486328
2015	77.5928192138672
2016	78.023078918457
2017	78.2071304321289
2018	78.4894332885742
2019	79.4096908569336
2020	79.9833908081055
2021	80.6960220336914
2022	80.8169479370117