2002

7.6

1966

7.5

1973

7.3

2006

4.9

2001

5.4

2004

6.1

1996

6.1

2012

10.0

2006

6.0

2005

4.2

1993

5.5

2000

5.5

1995

6.2

1991

6.7

1961

7.2

1988

6.7

2007

6.0

1986

7.0

1989

6.8

1993

7.5