Year	% gross
1970	0
1978	1.9120899438858
1979	1.46868002414703
1981	6.32159996032715
1984	7.89418983459473
1985	8.00403022766113
1999	3.89711999893188
2002	6.9433798789978
2003	7.74985980987549
2020	28.3269996643066