2005

7.2

1959

7.8

1985

6.9

2002

6.4

1993

7.4

1987

6.8

2002

6.8

1990

6.8

1973

4.0

2000

5.5

2007

5.4

2005

6.6

1986

6.1

1997

5.1

1992

7.5

1997

6.9

1993

7.7

1997

4.5

1974

0.0

1979

0.0