2013

10.0

1995

6.9

2013

4.8

1965

8.0

2000

5.2

2009

5.4

2002

7.8

1988

7.5

1997

6.1

1996

7.3

1998

6.5

1989

5.1

1995

7.9

1957

8.1

1997

7.1

2005

6.5

1992

7.3

1973

8.0

2007

6.6

2012

6.8