Year	gross (GPI)
1978	0.857959985733032
1979	0.689580023288727
1981	0.801959991455078
1984	1.26227998733521
1985	1.26772999763489
1999	1.23346996307373
2002	1.37758994102478
2003	1.37437999248505
2020	1.56747984886169