Year	% change from 1990
1991	0.788498271784621
1992	3.6053756594506
1993	6.06921957431328
1994	9.83604693469164
1995	12.9502455885028
1996	15.6488766599964
1997	17.3810714935419
1998	20.1257504093142
1999	23.4684828088048
2000	26.3569901764599
2001	29.0379979989085
2002	31.8571493541932
2003	34.3391850100055
2004	37.0088229943606
2005	39.6284336911042
2006	42.7295570311079
2007	47.0933008913953
2008	51.9567491358923
2009	54.9293933054394
2010	60.0850463889394
2011	61.6858968528288
2012	63.2867473167182