Year	Percent
1984	1.742
1985	3.187
1986	0.7439
1987	0.8163
1989	0.2257
1991	0.5704
1992	5.068
1993	3.053
1994	3.184
1995	2.523
1996	4.574
1997	3.799
1998	4.919
1999	3.798
2000	3.883
2001	3.185
2002	3.172
2003	3.79
2004	4.065
2005	4.094
2006	3.682
2007	2.33