1939

6.0

2005

4.3

2005

6.1

2008

0.0

1996

6.2

1997

6.3

1998

6.8

2000

6.1

2002

6.5

2003

6.7

1967

7.6

1970

6.7

1999

6.5

2005

6.9

1998

6.3

1988

6.3

1986

6.7

2011

2.7

1972

7.1

2005

6.3