1997

6.3

1985

8.1

1989

5.1

2021

5.4

1953

7.1

1965

7.7

1987

8.0

2001

4.7

1944

6.3

1986

6.7

1990

7.2

2007

5.9

1995

6.0

2003

6.7

2008

5.5

1968

6.9

1988

7.5

2003

5.3

2006

6.1

2012

4.9