2000

5.5

1951

7.2

2009

5.2

1993

6.2

2011

6.5

2014

5.3

1997

6.0

2005

5.6

2007

4.9

1999

6.2

1995

5.0

2002

8.3

1980

6.2

1990

5.8

1958

7.0

1990

6.1

2024

7.3

1961

7.2

1966

7.7