2004

4.6

2009

5.7

1981

7.1

2019

6.1

1991

7.5

2006

5.7

1967

7.8

2007

6.7

2008

6.9

2006

6.5

1993

5.7

2022

5.4

2000

8.1

1993

5.5

1999

7.0

2007

7.3

2005

6.3

1976

7.6

1984

6.8

2007

5.3