Year	% gross
1970	109.325187683105
1971	105.866889953613
1972	103.441833496094
1973	104.529266357422
1974	103.70532989502
1975	107.279731750488
1976	110.563568115234
1977	110.05883026123
1978	108.307411193848
1979	109.383773803711
1980	109.338249206543
1981	110.795852661133
1982	112.056442260742
1983	113.970207214355
1984	116.389450073242
1985	120.115821838379
1986	122.417701721191
1987	123.254127502441
1988	121.985572814941
1989	119.660667419434
1990	116.695907592773
1991	114.173057556152
1992	112.453163146973
1993	111.301116943359
1994	110.690132141113
1995	110.895858764648
1996	110.427398681641
1997	110.318649291992
1998	110.834182739258
1999	112.330688476562
2000	113.005111694336
2001	113.947257995605
2002	113.206108093262
2003	112.119033813477
2004	110.950790405273
2005	109.553886413574
2006	108.029312133789
2007	109.217300415039
2008	109.335647583008
2009	109.29125213623
2010	106.938026428223
2011	106.456008911133
2012	106.384819030762
2013	106.202781677246
2014	103.483039855957
2015	102.549240112305
2016	102.058601379395
2017	101.730003356934
2018	101.578430175781
2019	101.543411254883
2020	101.623352050781
2021	101.467826843262
2022	101.90364074707