2005

6.7

1965

3.8

1998

5.4

2000

6.6

1988

7.3

1992

6.4

1997

6.2

2009

6.2

2005

6.1

1979

8.2

2004

5.9

1999

7.4

2013

3.2

2001

7.0

1986

8.0

1955

6.0

1977

7.3

2024

3.7

1979

2.8

1982

7.5