Year	%
1984	53.02168
1985	49.6612
1986	50.73008
1987	58.35171
1988	60.07359
1989	71.12571
1990	87.93353
1991	79.98392
1992	87.77191
1993	85.69542
1994	91.94542
1998	95.52193
1999	96.84041
2000	95.16801
2001	95.88173
2002	100
2003	97.14496
2004	100
2005	98.45508
2006	98.30338
2007	98.09901
2012	97.377