1984

7.2

2002

6.3

2001

6.8

1985

7.5

2003

6.2

1986

4.5

1983

6.5

1994

5.6

1958

7.1

2003

3.1

2008

6.7

1990

6.0

1997

4.0

2003

6.3

2002

5.7

1997

6.5

1997

5.1

2003

5.6

2007

6.5

1983

4.9