2005

7.8

1988

7.8

2005

6.3

1972

7.1

1987

7.1

1997

7.5

1971

6.4

1977

6.8

1998

4.7

2016

4.6

2021

5.9

2016

6.0

1944

8.1

1966

7.3

1999

7.0

2006

6.0

2006

5.3

2008

6.6

2003

6.3

1997

6.8