Year	% change from 1990
1991	0.652648649186438
1992	-0.158353521334598
1993	3.66103392413291
1994	7.39867447324654
1995	14.805805521978
1996	19.5227506752824
1997	21.1750991989467
1998	24.3032030523263
1999	28.0716852296789
2000	28.347601731774
2001	29.2055296054759
2002	28.9728908720388
2003	29.3446485629625
2004	29.9513664002016
2005	30.6464637420181
2006	30.8338349243302
2007	31.9890694616478
2008	32.7350720715791
2009	33.9821682327913
2010	34.747239591365
2011	36.0947119872787
2012	37.4421843831923