Year	% change from 1990
1991	3.99166012442682
1992	7.69849739277131
1993	10.1636684926408
1994	15.254775161083
1995	19.2623996535665
1996	22.1428497137021
1997	25.5733475927628
1998	27.5972456101326
1999	26.7315211713343
2000	24.5518571599673
2001	21.1886288570932
2002	18.3775020039332
2003	22.4164523045825
2004	25.6448083897207
2005	26.2743702325877
2006	28.3964746156004
2007	30.7311700363665
2008	32.2893930543003
2009	36.7604462731326
2010	41.5879724616092
2011	43.2241873072605
2012	44.8604021529118