Year	% change from 1990
1991	13.0211544013796
1992	18.0120637051025
1993	18.8610489024838
1994	23.4524357603802
1995	18.9398609474612
1996	2.11622045523712
1997	8.9814518583256
1998	1.51069424828134
1999	2.79509648623131
2000	5.27572510982968
2001	10.7496508080186
2002	9.83277800753788
2003	9.19681942677892
2004	9.43715714809641
2005	15.2122853152092
2006	16.4584520065859
2007	17.8653640570256
2008	18.9835587149735
2009	21.318268007772
2010	19.7708988474714
2011	19.4191154740005
2012	19.0673321005295