2011

7.6

1968

7.0

2002

1.0

1991

6.6

1989

6.2

1988

6.2

1952

7.6

1992

6.0

1995

6.1

1992

5.6

1997

0.0

2004

7.3

1989

2.5

2005

7.7

1986

6.3

2008

6.2

2006

6.3

1991

7.3

1995

7.4

1992

5.4