1991

6.1

1982

6.2

2008

7.0

1993

7.3

1999

5.8

1953

7.7

2007

6.1

1980

5.5

2006

6.5

2004

4.4

2008

5.4

2023

0.0

2003

5.7

2008

5.9

1998

6.3

2008

5.6

1983

7.5

1942

6.9

0.0

2020

7.6