2001

7.8

1996

6.4

1982

7.6

2004

7.9

1993

7.1

1995

10.0

1998

4.0

1999

8.2

1991

7.4

1995

5.0

1986

7.1

1993

7.0

1992

5.9

2003

7.6

2009

7.5

1993

7.0

2004

5.3

1989

8.0

1995

6.0

2011

5.6

1996

4.2

2008

8.4

1969

7.5

1999

8.2

1983

5.0

1988

4.9

2002

7.3