Year	% gross
1970	80.7023315429688
1971	79.6979522705078
1972	79.5477066040039
1973	80.9956588745117
1974	80.7406692504883
1975	84.2121810913086
1976	86.6194534301758
1977	87.3931732177734
1978	86.4518432617188
1979	86.940788269043
1980	87.9460296630859
1981	88.8569412231445
1982	89.5677185058594
1983	90.2267532348633
1984	91.2885284423828
1985	92.1779403686523
1986	93.3536224365234
1987	93.2471694946289
1988	93.2626876831055
1989	92.8155288696289
1990	91.9293518066406
1991	91.6432189941406
1992	91.4326782226562
1993	91.8210906982422
1994	92.2516021728516
1995	92.3538208007812
1996	92.1695022583008
1997	92.8753814697266
1998	93.2433700561523
1999	93.9723434448242
2000	94.8349227905273
2001	95.4268417358398
2002	95.8827667236328
2003	98.4447479248047
2004	99.2975006103516
2005	99.7987213134766
2006	99.9825134277344
2007	100.952239990234
2008	101.526077270508
2009	101.54174041748
2010	100.936531066895
2011	100.807403564453
2012	101.603248596191
2013	102.813232421875
2014	101.406860351562
2015	101.093490600586
2016	102.595558166504
2017	102.120536804199
2018	98.3964080810547
2019	98.6313705444336
2020	99.1292190551758
2021	99.1442489624023
2022	100.51392364502