Year	Percent
1992	80.67334
1994	76.02176
1998	101.03712
1999	98.9514
2000	96.43938
2001	96.84433
2002	97.13337
2003	96.50811
2004	89.18617
2005	88.28888
2006	85.49732
2008	82.70901
2009	87.40143
2010	84.01537
2012	87.68178
2013	88.74406