Year	gross (GPI)
2000	1.09856998920441
2007	1.00452995300293
2008	0.991859972476959
2009	0.977580010890961
2010	0.982230007648468
2011	1.00331997871399
2013	1.03975999355316
2014	1.05685997009277
2015	1.05159997940063
2018	1.03761994838715
2019	1.05335998535156
2020	1.04445004463196
2021	1.03030002117157