Year	% gross
1970	6.34167003631592
1971	6.35848999023438
1972	6.44906997680664
1973	6.54693984985352
1974	6.54338979721069
1975	6.45573997497559
1976	6.3870701789856
1977	6.13781023025513
1978	6.24392986297607
1979	6.32275009155273
1980	6.34970998764038
1981	6.63149976730347
1982	6.28959989547729
1983	7.12463998794556
1984	7.54754018783569
1985	7.40906000137329
1986	7.55650997161865
1987	7.80738019943237
1988	6.8259801864624
1989	6.98770999908447
1990	7.15387010574341
1991	7.15887022018433
1992	6.94599008560181
1993	6.79049015045166
1994	6.62537002563477
1995	6.46581983566284
1996	7.0308198928833
1997	7.26861000061035
1998	8.12473964691162
1999	8.95559024810791
2000	9.76315021514893
2001	9.92809963226318
2002	10.2809896469116
2003	10.7531995773315
2004	11.0994396209717
2005	10.8961801528931
2006	11.6234502792358
2007	13.3275604248047
2008	15.0694198608398
2009	16.219970703125
2010	17.7970199584961
2011	21.4743995666504
2012	22.0694808959961
2013	21.0230503082275
2014	21.7484092712402
2015	22.8847198486328
2016	22.9603004455566
2017	23.2044200897217
2018	23.566370010376
2019	24.1486797332764
2020	24.4573402404785
2021	25.9449806213379
2022	27.1867294311523