Year	% change from 1990
1991	1.6675166970249
1992	3.60922890103219
1993	5.72179720704311
1994	7.84796599878568
1995	9.85986642380086
1996	11.7593199757134
1997	13.5414693381906
1998	15.1034608378871
1999	16.3330904675167
2000	17.1463266545234
2001	15.1350333940498
2002	12.6782027929569
2003	9.91997571341834
2004	7.03982999392836
2005	4.16599878567092
2006	5.01979356405586
2007	5.6782027929569
2008	6.33612629022466
2009	7.05950212507591
2010	7.78287795992714
2011	8.86070673952641
2012	9.93853551912569