Year	% change from 1990
1991	3.26263524246952
1992	3.7465989692929
1993	3.95724706813496
1994	4.89748421820855
1995	7.23142927930098
1996	12.6849616988169
1997	13.2578258739542
1998	16.3172120460668
1999	18.5739157340341
2000	25.1119663590838
2001	29.7632647204232
2002	32.0255737330004
2003	33.7273502845823
2004	36.6174556534743
2005	36.4571433696297
2006	37.2004094129095
2007	40.4593451411365
2008	41.8191968915112
2009	38.1880676091833
2010	40.5815412176334
2011	41.9873566298098
2012	43.3931720419861