Year	% change from 1990
1991	-1.07118163875446
1992	-2.13739132534611
1993	-3.13037736180669
1994	-4.03406721544891
1995	-4.77785097325347
1996	-5.42991986613627
1997	-6.02756841169202
1998	-96.9425127442603
1999	-97.0774830078317
2000	-95.7132234168453
2001	-94.2157490573626
2002	-84.3473427236846
2003	-89.7885523737034
2004	-86.6542661095298
2005	-82.6882828447424
2006	-79.2702988236877
2007	-78.4370589379579
2008	-75.7068739862138
2009	-75.4146542760184
2010	-73.7530996435195
2011	-73.7530996435193
2012	-73.7530996435193