Year	% of total
1990	10.112872693326032
1991	11.013895575626412
1992	10.839176245289897
1993	10.877734275298955
1994	10.808900346263314
1995	10.2448872805752
1996	11.750227698276447
1997	12.190749644773248
1998	12.26400470551937
1999	11.934620405939684
2000	11.442051593176918
2001	11.793085927868383
2002	11.508680391960395
2003	11.496930004480578
2004	11.417439611396265
2005	10.90879401473137
2006	11.000551513316521
2007	11.314782242006428
2008	12.2508546038445