2013

4.7

1938

5.1

2012

0.0

1986

6.9

1988

6.8

1986

5.2

1995

6.5

1992

6.9

1999

7.7

2005

6.6

1958

8.2

1997

6.8

2006

6.9

1996

6.8

1955

7.4

1988

5.0

1971

6.8

2001

6.2

1991

7.0

2000

6.0