1938

4.5

2009

6.2

1995

6.5

1998

6.7

1995

5.4

1997

4.4

2004

6.5

2004

7.2

2007

5.2

1971

6.8

2001

6.2

2003

7.3

1967

7.5

1989

7.1

2000

6.0

1971

6.4

1990

7.0

1972

6.0

1973

6.1