Year	% gross
1970	2.44633007049561
1971	2.5266900062561
1972	2.48328995704651
1973	2.51186990737915
1974	2.53228998184204
1975	2.53663992881775
1976	2.62411999702454
1977	2.71613001823425
1978	2.83887004852295
1979	3.01174998283386
1980	3.08793997764587
1981	3.28206992149353
1982	3.45812010765076
1983	3.53916001319885
1984	3.65003991127014
1985	3.8219199180603
1986	3.92975997924805
1987	3.95731997489929
1988	4.29428005218506
1989	4.36585998535156
1990	4.43538999557495
1991	4.34725999832153
1992	4.2289400100708
1993	4.30490016937256
1994	4.35724020004272
1995	4.41216993331909
1996	4.44544982910156
1997	4.4808201789856
1998	4.51487016677856
1999	4.55549001693726
2000	4.87248992919922
2001	5.17664003372192
2002	5.50525999069214
2003	5.81960010528564
2004	6.16553020477295
2005	6.68956995010376
2006	6.73932981491089
2007	6.9675498008728
2008	6.95319986343384
2009	7.45852994918823
2010	7.85907983779907
2011	8.4435396194458
2012	8.99569034576416
2013	9.35529041290283
2014	9.54623985290527
2015	9.57859992980957
2016	9.5767297744751
2017	9.80311965942383
2018	9.69631958007812
2019	11.002269744873
2020	11.4199895858765
2021	11.9071102142334
2022	11.8752603530884