Year	% change from 1990
1991	0.822001997388044
1992	0.411656801518467
1993	1.29942645358696
1994	2.20649544591782
1995	3.53121715130496
1996	5.12275692012509
1997	8.72854822118168
1998	10.3313303241352
1999	11.2112303423103
2000	11.4212746183696
2001	13.4619456358196
2002	13.4484548348595
2003	17.6302283880179
2004	19.9094242613318
2005	22.5215805972303
2006	22.673914224738
2007	23.8717849266531
2008	25.9787857154903
2009	22.6780364139203
2010	22.3750555090248
2011	20.3559776614821
2012	18.3367873905981