2013

10.0

1996

6.2

1996

6.5

2011

8.1

2012

7.6

2010

7.9

2013

7.9

2000

7.6

2004

7.8

2001

7.0

1998

7.6

1993

6.6

1968

7.1

2000

2.0

1999

7.3

1975

7.4

2010

7.0

2010

7.5

1962

7.0

1983

6.3