Year	% change from 1990
1991	-16.7861911820364
1992	-29.4405727092856
1993	-40.1142698430626
1994	-50.0025528927771
1995	-56.2135819863695
1996	-55.5220916164435
1997	-58.6114450208989
1998	-62.6443685293683
1999	-68.8168395520211
2000	-71.6113653160345
2001	-70.0973418126362
2002	-70.3402822216102
2003	-68.4555255891369
2004	-67.6495339181821
2005	-66.4398502537247
2006	-67.8047280844815
2007	-68.0146087607596
2008	-70.6278457953219
2009	-71.0524615592244
2010	-70.1846763026784
2011	-69.93545299759
2012	-70.1533265949219