Year	gross (GPI)
2000	1.06315004825592
2001	1.07489001750946
2002	1.08195996284485
2003	1.1557799577713
2004	1.15174996852875
2005	1.09914994239807
2006	1.14164996147156
2007	1.2250200510025
2008	1.25123000144958
2009	1.27253997325897
2010	1.23829996585846
2011	1.27757000923157
2012	1.28375995159149
2013	1.31316995620728
2014	1.31412994861603
2015	1.30930995941162
2016	1.32632994651794
2017	1.32400000095367
2018	1.32348001003265