Year	% change from 1990
1991	1.34545606205947
1992	4.3107978479376
1993	11.3850773658089
1994	16.515827668182
1995	20.9659256787755
1996	26.0157651082287
1997	31.6970429995412
1998	32.6929974558952
1999	39.9833173457897
2000	41.2086582975351
2001	45.7621887642324
2002	46.9891979813988
2003	46.7456312299287
2004	48.0193518788839
2005	51.7837928014347
2006	53.3920006673062
2007	49.9136672644618
2008	50.102181257038
2009	51.0355757601034
2010	50.3115485673771
2011	51.8146640530508
2012	53.3177795387246