X scale titled Scale label.
Y scale titled Percentage.
Item 1, 1989 62.2, Year 1989 62.2%.
Item 2, 1990 66, Year 1990 66%.
Item 3, 1991 70.2, Year 1991 70.2%.
Item 4, 1992 70.9, Year 1992 70.9%.
Item 5, 1993 70.5, Year 1993 70.5%.
Item 6, 1994 73.8, Year 1994 73.8%.
Item 7, 1995 77.4, Year 1995 77.4%.
Item 8, 1996 76.2, Year 1996 76.2%.
Item 9, 1997 71.1, Year 1997 71.1%.
Item 10, 1998 78.2, Year 1998 78.2%.
Item 11, 1999 85.3, Year 1999 85.3%.
Item 12, 2000 88.1, Year 2000 88.1%.
Item 13, 2001 89.4, Year 2001 89.4%.
Item 14, 2002 90.3, Year 2002 90.3%.
Item 15, 2003 87.9, Year 2003 87.9%.
Item 16, 2004 90.1, Year 2004 90.1%.
Item 17, 2005 89.4, Year 2005 89.4%.
Item 18, 2006 89.6, Year 2006 89.6%.
Item 19, 2007 91.5, Year 2007 91.5%.