Year	% gross
1970	108.932678222656
1971	104.68025970459
1972	101.98755645752
1973	103.05940246582
1974	101.995681762695
1975	106.236763000488
1976	110.061737060547
1977	109.357582092285
1978	107.273818969727
1979	107.228218078613
1980	107.377113342285
1981	109.134902954102
1982	110.387283325195
1983	112.688926696777
1984	114.717308044434
1985	118.960639953613
1986	121.779823303223
1987	123.219932556152
1988	121.393966674805
1989	118.630149841309
1990	114.155250549316
1991	112.339111328125
1992	110.903579711914
1993	109.982299804688
1994	109.525413513184
1995	109.751640319824
1996	109.339179992676
1997	109.216796875
1998	109.058197021484
1999	110.242179870605
2000	111.31413269043
2001	112.19563293457
2002	111.049949645996
2003	109.942749023438
2004	108.95223236084
2005	107.65242767334
2006	106.136741638184
2007	106.65071105957
2008	106.977821350098
2009	106.882148742676
2010	106.3408203125
2011	106.041160583496
2012	105.996276855469
2013	105.310447692871
2014	102.467788696289
2015	101.65592956543
2016	101.38395690918
2017	101.15495300293
2018	100.788688659668
2019	100.893692016602
2020	101.380676269531
2021	101.621856689453
2022	102.054550170898