Year	% change from 1990
1991	1.45217897391581
1992	2.92816705172747
1993	4.41085695137651
1994	5.87714502389729
1995	7.35084037318567
1996	8.81783390063669
1997	10.299994709088
1998	11.7745718770392
1999	13.2519708647114
2000	14.6604116329518
2001	16.0602105782967
2002	17.467064072944
2003	18.9419939683603
2004	20.3957602158692
2005	21.8534064654944
2006	23.3115818063174
2007	24.7731080580589
2008	26.2328706724749
2009	27.6762314597626
2010	29.120121338248
2011	30.4113225516305
2012	31.702523765013