2005

7.2

1954

7.9

1963

7.1

1964

7.4

2007

6.2

2003

8.3

2001

6.9

1986

8.0

1980

8.2

1987

6.5

1989

6.4

1986

7.1

2004

7.5

1997

7.0

1975

7.8

2002

7.2

2005

6.3

2006

7.5

2014

6.4

1994

6.5