Year	% gross
1971	1.00171995162964
1972	1.14858996868134
1973	1.16049003601074
1974	1.05936002731323
1975	1.35671997070312
1976	1.9606499671936
1977	2.15886998176575
1978	2.4407799243927
1979	2.67793011665344
1980	2.81574010848999
1981	2.8796501159668
1982	3.03109002113342
1983	3.20849990844727
1984	3.39417004585266
1985	3.74588990211487
1986	3.86913990974426
1987	3.82169008255005
1988	4.09124994277954
1989	5.09552001953125
1990	5.87924003601074
1991	6.55957984924316
1992	7.41223001480103
1993	8.54378986358643
1994	9.38187026977539
1995	9.94838047027588
1996	10.7366695404053
1997	11.4932899475098
1998	13.0201797485352
1999	15.2465200424194
2000	18.2375392913818
2001	21.3927707672119
2002	23.9657306671143
2003	28.959810256958
2004	32.3502388000488
2005	33.4072303771973
2006	36.1294593811035
2007	37.0138702392578
2008	38.4216194152832
2009	40.5740013122559
2010	41.7058906555176
2011	42.3179397583008
2012	41.7421913146973
2013	40.4909591674805
2014	40.9742202758789
2015	40.9633293151855
2016	39.1485595703125
2017	39.3116188049316
2018	39.3128890991211
2019	40.3358612060547
2020	41.9845695495605
2021	42.7083702087402
2022	47.9515914916992