Year	% gross
1971	117.793380737305
1972	115.14404296875
1973	117.255416870117
1974	111.94930267334
1975	111.568290710449
1976	115.409538269043
1977	109.454132080078
1978	110.081619262695
1979	108.837371826172
1980	108.465148925781
1981	108.187660217285
1982	108.565223693848
1983	109.157569885254
1985	108.917991638184
1986	109.615386962891
1987	108.631622314453
1988	107.580497741699
1989	107.080673217773
1990	106.565063476562
1991	106.716796875
1992	106.863563537598
1993	106.668037414551
1994	107.836143493652
1995	107.405693054199
1996	107.378860473633
1997	106.299072265625
1998	106.175590515137
1999	105.828132629395
2000	99.9500503540039
2001	99.9516906738281
2002	99.8540420532227
2003	99.5940475463867
2004	99.5740432739258
2005	104.11351776123
2006	103.674560546875
2007	103.434463500977
2008	103.048461914062
2009	102.531387329102
2010	102.128540039062
2011	102.45629119873
2012	102.492378234863
2013	102.134307861328
2014	101.031097412109
2015	101.664520263672
2016	101.972618103027
2017	102.105812072754
2018	102.152076721191
2019	102.30638885498
2020	102.448181152344
2021	102.418243408203
2022	102.446769714355