1998

6.1

1978

7.6

1971

7.4

1967

6.6

1969

6.6

1977

6.8

1927

7.1

2003

7.2

2014

5.6

2017

4.6

2021

6.4

2003

6.1

1992

7.4

2007

7.5

2006

5.7

2006

6.8

2000

7.4

2005

6.8

1997

6.8

1995

6.5