2011

6.6

1968

6.9

2005

5.2

1999

5.9

1995

5.9

1989

5.5

2012

5.8

1955

7.2

2006

6.0

2003

6.8

1983

5.5

2002

7.1

2020

6.7

1988

6.5

1983

7.9

2002

6.1

1969

6.6

1995

7.3

2006

6.7

1991

7.0