2001

6.7

1990

6.1

1948

6.1

2006

5.4

2002

6.3

2008

5.2

2000

6.7

2002

5.2

1998

6.3

2003

7.3

2006

5.5

1993

6.1

2004

9.9

2001

6.1

1987

6.5

1994

6.3

1994

7.4

1962

7.4

1979

6.2

2010

6.3