Year	% change from 1990
1991	1.41955692341313
1992	3.95363448457973
1993	1.99776003205159
1994	6.7481310836528
1995	19.8683335913242
1996	24.4047239649254
1997	18.5653278457154
1998	21.6439179406864
1999	21.6439179406864
2000	21.6439179406864
2001	23.9339664733253
2002	23.9339664733253
2003	24.4283984229169
2004	32.3584312939913
2005	35.2749424073282
2006	40.6599710443168
2007	44.5607932764539
2008	47.6129772452037
2009	55.0139770357758
2010	61.6373619369349
2011	67.0522135618222
2012	72.4670651867095