Year	% change from 1990
1991	-2.39611577964519
1992	-2.95454715219421
1993	-5.03962651727358
1994	-6.57105508870215
1995	-10.4495985060691
1996	-15.1363585434174
1997	-19.0895985060691
1998	-24.0564705882353
1999	-26.0593837535014
2000	-29.0441083099907
2001	-31.0247619047619
2002	-33.9380765639589
2003	-35.1616059757236
2004	-35.8159477124183
2005	-36.8732026143791
2006	-37.3442390289449
2007	-37.8530718954248
2008	-38.7634733893558
2009	-39.6952380952381
2010	-39.8510550887021
2011	-40.7302986666667
2012	-41.8016169411765