Year	% gross
1970	114.258682250977
1971	109.902351379395
1972	106.53247833252
1973	107.367988586426
1974	106.115180969238
1975	110.112770080566
1976	113.565910339355
1977	112.700706481934
1978	109.926750183105
1979	109.929748535156
1980	109.510833740234
1981	110.64631652832
1982	111.36157989502
1983	113.218002319336
1984	115.38387298584
1985	119.531066894531
1986	122.678352355957
1987	124.090156555176
1988	122.756500244141
1989	119.216583251953
1990	115.873489379883
1991	112.87979888916
1992	111.289253234863
1993	110.303001403809
1994	109.902191162109
1995	110.514472961426
1996	110.207153320312
1997	110.313171386719
1998	110.913642883301
1999	112.66153717041
2000	114.17057800293
2001	115.202789306641
2002	113.973678588867
2003	112.686721801758
2004	111.185279846191
2005	109.28491973877
2006	107.201927185059
2007	107.815452575684
2008	108.196388244629
2009	107.524528503418
2010	104.178619384766
2011	103.35912322998
2012	103.456237792969
2013	103.609069824219
2014	100.714851379395
2015	100.060966491699
2016	100.244560241699
2017	100.611877441406
2018	100.723220825195
2019	100.819221496582
2020	101.049179077148
2021	101.210861206055
2022	101.822540283203