1955

7.2

2003

7.8

1972

7.1

1977

0.0

1971

7.2

1971

7.5

2008

6.6

2007

6.5

2005

5.4

2002

7.0

2001

6.9

1993

7.9

2001

6.1

1998

6.7

1983

7.2

1988

7.7

1973

7.4

1998

5.5

1967

6.7

1998

7.2