1991

6.3

2003

7.1

2003

6.7

1974

6.0

2007

6.1

1971

6.4

2017

1.7

1984

6.2

1995

7.0

2019

0.0

1927

8.1

1985

7.7

1985

8.3

2003

6.2

1997

6.5

2000

5.7

2006

7.6

1993

6.7

2006

5.7

1984

5.5