Year	% gross
1971	12.1765403747559
1998	23.8638496398926
1999	22.9745998382568
2000	24.4284706115723
2001	26.5433197021484
2002	30.6228008270264
2003	34.836368560791
2004	37.6273384094238
2006	45.623908996582
2007	48.4859390258789
2008	51.1581916809082
2017	46.9210014343262
2018	48.5190010070801
2019	48.875
2020	52.268798828125
2021	53.101001739502