Year	% change from 1990
1991	3.94281555416927
1992	0.394468704512363
1993	3.1208151382824
1994	1.2761488875026
1995	0.752131420253699
1996	8.75691411935953
1997	15.1135371179039
1998	21.1289249324184
1999	29.8419629860678
2000	33.2742773965481
2001	41.7837388230401
2002	41.9303389478062
2003	43.2672073196091
2004	46.062175088376
2005	48.3491370347265
2006	48.9839883551674
2007	51.802037845706
2008	54.5371179039301
2009	57.3605739238927
2010	54.3921813266791
2011	55.9361031399459
2012	57.4800249532127