Year	% change from 1990
1991	1.69173732463883
1992	2.55017341017028
1993	3.85759082497024
1994	5.94844518677826
1995	7.13626938068954
1996	9.32644692594746
1997	13.1432949756658
1998	18.6901907207822
1999	19.6469364878917
2000	24.5553260536872
2001	26.175915546916
2002	27.6313042350189
2003	31.2474789140935
2004	26.4748985991377
2005	38.3055059502695
2006	31.3366670788241
2007	31.8647015541037
2008	32.0562534079
2009	29.295474308741
2010	27.6911008454632
2011	30.5505305978597
2012	31.512188230072