Year	% gross
1971	1.68726003170013
1972	1.69015002250671
1973	1.96054995059967
1974	1.98573994636536
1976	2.07118010520935
1977	2.21984004974365
1979	2.82429003715515
1980	3.1793200969696
1987	4.97116994857788
1994	5.9435601234436
1995	5.8221697807312
1997	8.59570026397705
1999	8.74530982971191
2007	11.6311702728271
2008	10.7315702438354
2009	10.6874399185181
2010	9.87075996398926
2011	3.96601009368896
2013	10.0832395553589
2014	10.6311101913452
2015	10.7766895294189
2016	10.7654695510864
2017	11.1216201782227
2019	11.2233896255493
2020	10.8174104690552