Year	gross (GPI)
1993	1.00467002391815
1994	0.997070014476776
1995	0.996169984340668
1996	0.995890021324158
1997	1.03180003166199
2015	0.869009971618652
2016	0.867439985275269
2017	0.887780010700226
2018	0.940949976444244
2019	0.933780014514923
2020	0.962329983711243