Year	% change from 1990
1991	1.19472004974479
1992	2.32907021319626
1993	3.34147320633522
1994	4.03331210325664
1995	4.6400294605045
1996	5.21052488597638
1997	5.75717420636237
1998	6.26880899269826
1999	6.79010296084106
2000	7.3165283693188
2001	7.80975034033522
2002	8.31293334259005
2003	8.82245518290567
2004	9.34857874195194
2005	9.91665937197208
2006	10.6097056666194
2007	11.4509600321168
2008	12.4057097838456
2009	13.4153961321014
2010	14.5246927927411
2011	15.6699397206685
2012	16.815186648596